FCC ID: 2APEYX12000001 DIGITAL REFRACTOR

YPA-2100 DIGITAL REFRACTOR User Manual Version: 1.0 Date: 20180521 Preface Thank you for purchasing and using our digital refractor. Please read this User Manual carefully before using this device. We sincerely hope that this User Manual will provide you with sufficient information to use the device. Our pursuit is to provide people with high-quality, complete-function and more personalized devices. Information in promotional materials and packing boxes is subject to changes due to performance improvement without additional notice. Chongqing Yeasn Science & Technology Co., Ltd. reserves the rights to update the devices and materials. If you have any questions during using, please contact at our service hotline: (86-023) 62797666, we will be very happy to help you. Your satisfaction, our impetus!

Content 1. Specifications ............................................................................................................... 1 1.1 Measurement range ............................................................................................ 1 1.2 Host ..................................................................................................................... 1 1.2.1 Assistant lens ........................................................................................... 1 1.2.2 Adjustment range ..................................................................................... 2 1.3 Power parameters ............................................................................................... 2 1.4 Dimensions ......................................................................................................... 2 1.5 Weight ................................................................................................................ 2 2. Safety Precautions ........................................................................................................ 2 3. Main Structure .............................................................................................................. 5 3.1 Host ..................................................................................................................... 5 3.2 Printing base ....................................................................................................... 7 4. Installation Method ....................................................................................................... 8 4.1 Part List .............................................................................................................. 8 4.2 Installation Instructions ...................................................................................... 8 4.2.1 Install the device onto the compound table ............................................. 8 4.2.2 Install short-distance visual chart ............................................................ 8 4.2.3 Install short-distance vision rod. ............................................................. 9 4.2.4 Horizontal adjustment after installation .................................................. 9 4.2.5 Install printing paper .............................................................................. 10 4.2.6 Router settings ....................................................................................... 10 4.2.7 Install APP ............................................................................................. 10 5. Directions for Use ....................................................................................................... 11 5.1 Device Startup and Shutdown .......................................................................... 11 5.1.1 Device startup ........................................................................................ 11 5.1.2 Device shutdown ................................................................................... 11 5.2 Operation Interface ........................................................................................... 11 5.2.1 Main interface ........................................................................................ 11 5.2.2 Assistant lens setup ................................................................................ 16 5.2.3 Pupil distance input ............................................................................... 18 5.2.4 System parameter setup ......................................................................... 20 5.3 Preparations before Use .................................................................................... 24 5.4 Standard Optometry Procedure ........................................................................ 25 5.5 Binocular Functional Testing Method .............................................................. 51 5.5.1 Crisscross matrix test (presbyopia) ....................................................... 51 5.5.2 Cross test (heterophoria) ........................................................................ 51 5.5.3 Cross fixation vision test (heterophoria) ............................................... 53 5.5.4 Cross ring test (heterophoria) ................................................................ 54 5.5.5 Horizontal coincidence test (horizontal image inequality and horizontal heterophoria) ................................................................................................... 55 5.5.6 Vertical coincidence test (vertical image inequality and vertical heterophoria) ................................................................................................... 55 5.5.7 Horizontal Maddox rod test (horizontal heterphoria) ............................ 56 5.5.8 Horizontal Maddox rod test (horizontal heterphoria) ............................ 57 5.5.9 Clock test (rotatory heterophoria).......................................................... 58 5.5.10 Worth 4 dot test ................................................................................... 59 5.5.11 Stereopsis ............................................................................................. 60 5.5.12 Divergence test .................................................................................... 61 5.5.13 Congregation test ................................................................................. 62 5.5.14 Near point congregation (NPC) test .................................................. 63 5.5.15 Near point adjustment (NPA) test ..................................................... 64 5.5.16 Negative-relative adjustment (NRA) test ............................................ 64 5.5.17 Positive-relative adjustment (PRA) test .............................................. 65 5.6 Customer Self-programming ............................................................................ 66 5.6.1 Self-programming .................................................................................. 66 5.6.2 Run Customized Program ...................................................................... 71 6.Troubleshooting ........................................................................................................... 76 7.Cleaning and Protection .............................................................................................. 77 7.1 Clean the forehead baseplate ............................................................................ 77 7.2 Clean the nose baseplate ................................................................................... 77 7.3 Clean the testing window ................................................................................. 77 7.4 Clean external parts .......................................................................................... 78 8.Maintenance and Care ................................................................................................. 79 9. Environmental Conditions and Service Life .............................................................. 80 10.Environmental Protection .......................................................................................... 81 11.Manufacturers Responsibility .................................................................................. 81 12.Symbol Description ................................................................................................... 81 13.Electrical Schematic Diagram ................................................................................... 82 14.Electromagnetic Compatibility .................................................................................. 83 1. Specifications 1.1 Measurement range The measuring range conforms to the requirements in Table 1. Table 1 Vision tester measurement range Item Measuring range Spherical power

-29.00D~+26.75D, Step size: 0.12D, 0.25D, 1D Cylindrical power 8.75D8.75D, Step size: 0.25D, 1D Cylindrical axis 0~180, Step size: 1, 5 Prismatic power 0~20, Step size: 0.1, 0.5 0~360, Step size: 1, 5. Prim base can be marked horizontally or vertically. Prism base 1.2 Host 1.2.1 Assistant lens a. Automatic crisscross cylinder: automatic crisscross cylinder 0.25D and 0.50D, one at left, one at right (the axle is self-rotatory);

b. Fixed crisscross cylinder: fixed crisscross cylinder 0.50D, one at left, one at right (the axle is fixed at 90) c. Pinhole plate: hole diameter 1mm, one at left, one at right;

d. ross plate: used when setting pupil distance, one at left, one at right;

e. Red and green optical filter: one is red optical filter (right) and one is green optical filter (left);

f. Inear polarized optical filter: one at 135 right and one at 45 left One at 135 right/sphere 0.125D, one at 45 left/sphere 0.125D;

g.Circular polarized optical filter: two at left, two at right, one includes sphere 0.125D;

h. Maddox rod lens: right eye: red, horizontally, left eye: white, vertically;

i. Sphere for retinoscopy: +1.5D and +2.0D, one at left, one at right;

j. Decomposing prism: right eye: 6BU, right eye: 10BI k. Single-slit lens: used for quick astigmatism test, one at left and one at right. 1 1.2.2 Adjustment range 1Adjustment range of pupil distance: 48mm~82mm 2Forehead base can be adjusted continuously; the adjustment range should reach at least 14mm;

3Adjustable range of near vision optometry distance: 150mm~400mm;

4Corneal vertex marking: 12mm, 13.75mm, 16mm, 18mm and 20mm;

5Horizontal adjustment: 2.5. 1.3 Power parameters Input voltage AC 110V~220V(10%) Input frequency 50/60 Hz Input power 70 VA 1.4 Dimensions 1) Host 2) Printing base 400mm (L) 92mm (W) 275mm (H) 200mm (L) 200mm (W) 80mm (H) 1.5 Weight about 3.9kg about 0.6kg 1) Host 2) Printing base

* The design and specifications are subject to changes due to technical updates without additional notice. 2. Safety Precautions Please read the following matters needing attention carefully in case of personal injury, device damages or other possible hazards:

Use the device indoors and keep it clean and dry; do not use it under inflammable, explosive, high fever and dusty environment;

Do not use the device near water; also be careful not to make any kinds of liquid drop onto the device. Do not place the device in damp or dusty places, or places where humidity and temperature change quickly;

Make sure the device host is stably and reliably installed before using it; fall of the device host 2 may cause personal injury or device failure;

Dedicated power adaptor configured for the device should be used: model MDS-060AAS15 B, Input 100V- 250V1.5-0.75A 50Hz, Output 15V 4.0A. Make sure the input voltage is consistent with rated input voltage and the electric wire is correctly connected and well grounded;

Do not use multi-pin socket or extend the power line to insert the plug of the device into power socket;

Unplug power line and cut off power supply line especially under emergency circumstances; hold the power plug to pull out it from the socket rather than pulling the power cord;

Do not touch the power line with wet hands. Check the power line and do not allow the power cord to be stamped, pressed by heavy objects or knotted;

Power line damage may cause fire or electric shock. Please check it regularly;

Before testing each patient, clean the contacting part with ethanol for disinfection;

Cut off power and put on dust cover when not using it;

Do not dismantle or touch the interior parts of the device, otherwise it may cause electric shock or device failure;

The device has passed electromagnetic compatibility test, which is in accordance with YY 0505 2012 standard. Follow below instructions related to EMC (electromagnetic compatibility) when mounting and using the device:

- Do not use the device with other electronic devices to avoid electromagnetic disturbance;

- Do not use the device nearby other electric devices to avoid electromagnetic disturbance;

- Do not use a power adaptor that is not configured with the device, otherwise it may increase the

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electromagnetic emission measure, which may reduce the capacity of resisting disturbance. Caution: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. 3 NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help. FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. End user must follow the specific operating instructions for satisfying RF exposure compliance. The portable device is designed to meet the requirements for exposure to radio waves established by the Federal Communications Commission (USA). These requirements set a SAR limit of 1.6 W/kg averaged over one gram of tissue. The highest SAR value reported under this standard during product certification for use when properly worn on the body 4 3. Main Structure 3.1 Host Front side (tester side) 9.Spirit level 1.Horizontal adjusting knob 2.Forehead baseplate indicator Forehead 3.Forehead baseplate knob 4.Near vision indicator 5. Cornea observation window 7.Short-distance vision rod 6.Testing window 8.Short-distance visual chart Back side (testee side) 5 11.Forehead baseplate 12.Cornea alignment window 10.Nose baseplate 1.Horizontal adjusting knob Adjust the horizontal level of the vision tester. 2.Forehead baseplate indicator Make sure the forehead of the testee contact the baseplate. The indicator is always on when the forehead doesnt contact the baseplate; the indicator is off when the forehead contacts the baseplate. 3.Forehead baseplate knob Adjust the distance of the testees corneal vertex 4.Near vision indicator Light up short-distance visual chart during short-distance test. 5.Cornea observation window Observation distance should be 200mm-250mmThe window through which to observe and confirm the distance of the testers corneal vertex. 6.Testing window Light aperture for testing. 7.Short-distance vision rod Install and support the short-distance visual chart. 8.Short-distance visual chart For testing short-distance vision. 9.Spirit level Confirm the horizontal location of the vision tester. Rotate the horizontal adjusting knob to keep the air bubble in the spirit level in the middle. 10.Nose baseplate The nose or face of the testee may contact the nose baseplate during vision test. Clean this part before every time of vision test. 11.Forehead baseplate The forehead of the testee may contact the forehead baseplate during vision test. Clean this part before every time of vision test. 6 12.Cornea aiming window Shows the alignment position of the testees corneal vertex. 3.2 Printing base 2. Printing Front 1. Power switch Back 5. output Power 6. Power input interface 1.Power switch Turn on power switch; power indicator is lit up. 2.Printing bin Install printing papers. 3.LAN Port Connect to LAN (preserved port). 4.R232 serial port Connect to lens meter LM, computer vision tester RK and PC (preserved port). 4. R232 serial port 3. LAN Port 7 5.Power output interface Connect to the power input interface of the host. 6.Power input interface Connect to the output interface of the power adapter. 4. Installation Method 4.1 Part List Digital refractor 1Set Printing bin 1Pcs Near Vision Chart 1Pcs Near Vision Rod 1Pcs Power adaptor 1Pcs Dust cover 1Pcs Blowing balloon with brush 1Pcs Printing paper 2Rolls Power Cord 1Pcs DC power cord 1Pcs Hex wrench (2.0mm) 1Pcs Hex wrench (2.5mm) 1Pcs Hex wrench (3mm) 1Pcs Stainless steel flat head set screw(M6*8) 2Pcs 4.2 Installation Instructions 4.2.1 Install the device onto the compound table Take out 3 Pcs Stainless steel flat head set screw((M6*8) ), and then please refer to compound table manual. 4.2.2 Install short-distance visual chart Insert the card tray of the visual chart into the short-distance vision rod and screw the knob tight. The card tray can slide on the rod and rotate 360. 8 Knob Card tray Short-distance visual chart Short-distance vision rod 4.2.3 Install short-distance vision rod. Insert the vision rod into the installation hole in the vision tester host and screw the knob. Attention during installation: align the flute on the vision rod at the knob and keep the end of the vision rod close to the end of the installation hole in the vision tester host. Flute Knob 4.2.4 Horizontal adjustment after installation Rotate the horizontal adjusting knob until the air bubble in the spirit level in the middle. Horizontal adjusting knob Spirit level 9 4.2.5 Install printing paper Please refer to Replace printing paper (see 8.1). 4.2.6 Router settings Follow the setup guide provided by the router supplier to enter the router setup screen. Router parameters are set as follows:

1)LAN IP ADDRESS: 192.168.1.253 2) Router working mode: Access Point mode (AP) 3)SSIDyeasn_xxxxxx (xxxxxx is consistent with the nameplate serial number) 4)WPA-PSK/WPA2-PSK PSK passwordyeasn2002 5)After the setting is completed, click the "Reboot Router" button on the setting interface 4.2.7 Install APP 1) Please contact the dealer to download the dedicated APP 2) Install the APP pad recommendation: Samsung and Huawei 10-inch Android pad. If you use other pad, fonts and images may be mismatched. 3) Connect the tablet WIFI to the router with "SSID: yeasn_xxxxxx". 4) The first time you open the app, you are prompted to enter the SSID number. The SSID number is: yeasn_xxxxxx. 10 5. Directions for Use 5.1 Device Startup and Shutdown 5.1.1 Device startup 1Insert the power plug into the socket. The power adaptor configured with the device is three-pin plug, please select suitable power socket. Note: please use dedicated power line configured with the device. 2Start up the host first: press the power switch on the printing base, the power indicator is on. 3After the host is initialized, start up the compound laptop and open the operation interface. 5.1.2 Device shutdown 1Press the power swtich on the printing base to turn off the device, the power indicator is off. 2Put the dust cover on the host. 5.2 Operation Interface 5.2.1 Main interface 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 11 2 2 31 30 29 27 28 1. Date 2. Test number 3. Time 4.R Right testing window, input right eye data and select right eye as the dominant eye. 5. Measurement mode LD: Long-distance mode, SD: short-distance mode. Press LD or SD to shift between long-distance mode and short-distance mode. 6. PD Press this key to display left pupil distance, right pupil distance and binocular pupil distance. 23 17 18 19 20 21 22 24 12 7.L Left testing window, input left eye data and select left eye as the dominant eye. 8. Sighting mark area Select and display sighting marks. 9. Procedure Display current procedure. 10.S Spherical power input window Press S input window aside R to input the spherical power of right eye; press S input window aside L to input the spherical power of left eye. 11.C Cylindrical power input window Press C input window aside R to input the cylindrical power of right eye; press C input window aside L to input the cylindrical power of left eye. 12.A Cylindrical axis input window Press A input window aside R to input the cylindrical axis of right eye; press A input window aside L to input the cylindrical axis of left eye. 13. Prismatic power input window Press input window aside R to input the prismatic axis of right eye; press input window aside L to input the prismatic axis of left eye. 14. Prism base input window Press input window aside R to input the prism base of right eye; press input window aside L to input the prism base of left eye. 15.ADD Additional power input window Press ADD input window aside R to input the additional power of right eye; press ADD input window aside L to input the additional power of left eye. 13 16.VA VA Input box 17. Operation time Display the time spent from beginning to the end. 18. Del: data deletion Delete displaying data 19. Print: Printing is enabled when UNA, LM, AR, SUBJ or FINAL state requires measurement data. 20. Quick test Under non-prism mode, click this key to do near vision test. Under prism mode, click this key to do near vision test and also converge and diverge test. 21. Polar coordinate: prismatic power mode key Press this key to shift prismatic power between /(polar coordinate model) and X/Y (rectangular coordinate model). 22. Quick Set Click this key to quickly set spherical lens step, cylinder axis step and cylinder axis angle 23. Cylinder shift-out/shift-in Press this key to shift in and out cylinder. 24. Cross cylinder: crisscross cylinder Press this key to call in crisscross cylinder and Shift among 0.25XC, 0.50XC and Slit Prism. 25. Wizard Prompt operating information. 26. Current data. Display current data. 27. Data Report Click this key to check test data. 28.Peripheral device connectivity status 1)

:Phoropter Head is connected 14 2) 3)

:LCD visual chart is connected

:LM is connected.

:Print Box is connected. 4) Remarks: All peripheral devices are connected automatically after powering on. If icons disappear, the peripheral devices are not well connected. 29. System Setting Click this key to set system 30. Right auxiliary lenses Click this key to popup the choice box related to right auxiliary lenses. 31. Left auxiliary disc lenses Click this key to popup the choice box related to left auxiliary lenses. 15 5.2.2 Assistant lens setup 1. Press Assistant lens key to display assistant lens interface. 2. Press corresponding keys in the interface to. The selected assistant lens will be called in the testing window and return to testing interface automatically. Right assistant lens 16 Left assistant lens Keys description:

Open testing window Baffle plate, shelter testing window Pinhole plate (hole diameter 1mm) Right eye: red optical filter, left eye: green optical filter Right eye: 45 linear polarized optical filter, left eye: 135 linear polarized optical filter 17 Binocular: circular polarized optical filter Right eye: fixed crisscross cylinder, left eye: fixed crisscross cylinder Right eye: horizontal Maddox rod, left eye: open testing window Right eye: open testing window, left eye: vertical Maddox rod Scieropia, press to change scieropia value. Retinoscopy lens, 1.50D and 2.0D optional Single-slit lens, press to change angle. Binocular equilibrium prism, press to change prismatic power Horizontal heterophoria prism, press to change prismatic power Vertical heterophoria prism, press to change prismatic power Right eye: 6 base-upward prism Left eye: 10 base-inward prism 5.2.3 Pupil distance input 1. Press to display PD input interface, PD adjusting lens is called into the testing window. The factory default PD value is 64.0. 2. Click the data frame to be changed and input pupil distance. Input left eye PD, binocular PD and right eye PD respectively. 18 Press + to enlarge PD, press - to reduce PD. 3. Press to exit PD input interface. 19 5.2.4 System parameter setup 1.Press to enter system parameter setup interface 2. Select needed parameter to change parameter setup. 3. When the setup is finished, press exit to return to testing interface. Detailed parameters are set as follows:

AXIS step : 1, 5; Factory default: 5 Set step size for cylindrical axis, selectable between 1and 5. step : 0.1, 0.5; Factory default: 0.5 Set step size for prismatic power, selectable between 0.1 and 0.5. Angle step: 1, 5; Factory default: 5 Set step size for prism base, selectable between 1and 5. SPH step : 0.12D, 0.25D; Factory default: 0.25D Set step size for small spherical power, selectable between 0.12D and 0.25D. The default setup for big spherical power (1D or above) is 1D. Slit step : 1, 5; Factory default: 5 Set step size for single-slit axis, selectable between 1and 5. Display: X/Y and r/; Factory default: r/

Selectable between rectangular coordinate (X/Y) and polar coordinate (r/). CYL Sign: + and -; Factory default: -

Set the input method of cylindrical power. When - is set, negative cylindrical power can only be input; When + is set, positive cylindrical power can only be input. XC Type: 0.25D,0.50D and Auto; Factory default: 0.25D Set the crisscross cylinder in the testing window, Shift among 0.25 XC, 0.50 XC and Slit Prism. XC Auto Occlusion: on, off; factory default: on Set this item On during crisscross cylinder test, the testing content changes according to cylindrical power value. When the cylindrical power value C = 0, prompt message skip crisscross cylinder test? occurs:

Yes means, dont carry out crisscross cylinder test;

20 No means, carry out crisscross cylinder test. When the cylindrical power value C 0, carry out crisscross cylinder test in the organized sequence. Set this item Off, carry out crisscross cylinder test in the organized sequence. S.E.Fix(XC): on, off; factory default: on Select if adjust spherical power value, so as to keep refraction spherical equivalency during crisscross cylindrical test. S.E.Fix(CYL): on, off; factory default: on Select if adjust spherical power value, so as to keep refraction spherical equivalency during crisscross cylindrical test. Retinoscopy: +1.50D and +2.00D; factory default: +2.00D Set spherical lens for retinoscopy. N.V.illumination: on, Except Grid, off; factory default: on If the short-distance indicator is automatically lit on when setting short-distance vision test. Set it On: the short-distance indicator is automatically on during ADD testing mode and short-distance vision test Except grid: the short-distance indicator is automatically on during ADD testing mode and short-distance vision test But only when the cross-matrix sighting mark is used for near vision test, the short-distance indicator is off. Set it Off: the short-distance indicator is not automatically on. F N Link: SPH, SPH+ADD; factory default: SPH+ADD Set the spherical value shifting from long-distance mode to short-distance mode. SPH: the spherical value in long-distance mode is used in short-distance mode. SPH+ADD: the additional power is added to the spherical value in the long-distance mode. ADD Estimation: on, off; factory default: on Set if pre-add additional power according to the age of the patient during short-distance vision test. Working Distance : 35cm and 40cm; factory default: 40cm Set working distance. 21 Div&Con Test: on, off; factory default: on Set if test the eyes collecting capability. Printing mode: all, except for AR; U.S.F, U, LM, AR, SUBJ and FINAL; factory default: all Set data content to be printed All: all data Except for AR: all data except for AR;

U.S.F: uncased eye, subjective and final data. LM: lens meter data and vision functional test data;

AR: auto refractometer data and vision functional test data;

SUBJ: subjective and vision functional test data;

FINAL: final data and vision functional test data. Date Format: M/D/Y, D/M/Y, Y/M/D; factory default: M/D/Y Set printing data format. Clear data after print: on, off; factory default: off Set if delete measuring data after printing. Clear data: on, off; factory default: off Set if prompt Confirm delete message when pressing delete. Set it Yes to avoid mistaken deletion of data when the Delete key is accidentally pressed. CYL from LM: on, off; factory default: off Import data from lens meter, set if automatically input prism data. Fog:Balance :on, off; factory default: open Set if automatic scieropia during vision test to keep the patients vision to 1.0 from 0.7. AR data: on, off; factory default: off Set if automatically receive computer refractor data. LM data: on, off; factory default: off Set if automatically receive lens meter data. Close link: on, off; factory default: off Avoid shifting assistant lens or mode through a corresponding sighting mark during optometric test. Operation time: on, off; factory default: on 22 Set if display test time. Set it on, all time spent from beginning to the end of the test displays. Set it off, operation time doesnt display. SUBJ Startup: AR, LM; factory default: AR When inputting a set of AR or LM data, the vision tester automatically selects input data to carry out subjective optometry. When inputting two sets of AR or LM data, the vision tester automatically selects input data. AR: the vision tester automatically selects computer refractor data to carry out subjective optometry

(priority option);

AR: the vision tester automatically selects computer lens meter measurement data to carry out subjective optometry. 23 5.3 Preparations before Use 1Turn on power switch, the device is automatically initialized. 2Confirm the device is leveled. If the device is not leveled, rotate horizontal adjusting knob to keep the air bubble in the spirit level in the middle. Start up the combined tablet computer used and open the operation interface. 4Press to input the patients PD, call the PD adjusting lens in the testing window. 5Keep the patients forehead on the baseplate, the indicator is off. 6The tester can observe the testees eyes through testing window to make sure his eyes are in the center of the testing window. 7Adjust corneal vertex distance (VD). The tester can confirm the corneal vertex distance of the testee through cornea observation window. Rotate the forehead baseplate knob, adjust the corneal vertex of the testee to needed position. The corneal vertex is marked below:

8Press the PD adjusting lens exits the testing window. VD13.75 VD20 VD18 VD16 VD12 24 5.4 Standard Optometry Procedure Press Program Regto start up standard optometry procedure . 1. Press to input AR (computer refractor) measurement data:

25 26 key 2. Press to test the uncased eye vision of the patient. The lens degree tested by the vision tester host is automatically 0. 1Right eye test L testing window is baffled, test uncased right eye vision. Call in visual chart to test the best right eye vision. Input the tested right eye vision. 2Left eye test R testing window is baffled, test uncased left eye vision. Call in visual chart to test the best left eye vision. Input the tested left eye vision. 3Binocular test Open L and R testing windows, test the uncased binocular vision. 27 Call in visual chart to test the best binocular vision. Input the tested binocular vision. 3. Press to select if input degree with glasses. Select No to skip to step 6; select Yes to skip to step 4. 28 4. Press patient wears and input measurement data. to input degree with glasses. Use LM to measure the degree of the glasses the 29 to test the patients vision with glasses. 5. Press Test the patients vision with glasses according to step 2 the method to test the uncased eye vision of the patient. 30 6. Press to begin SUBJ subjective correction. Right eye scieropia. Baffle the left eye, change the cylindrical power of right eye to 0. Put on 0.5 sighting mark, and then gradually increase the positive spherical power until the 0.5 sighting mark becomes blurred. 31 7. Press to test the astigmatic axis with astigmatism disk. 1Call in astigmatism disc sighting mark. Ask the patient:

Do the definitions of all lines look the same?

Which line looks especially distinct?

If the answers are:

The definitions of all lines look the same. No astigmatism, turn to step 9. One line looks especially distinct. Multiply the smaller figure (1~6) corresponding to the especially distinct line with 30, the astigmatic axis of the negative cylinder can be obtained. For example: line 3-9 is especially distinct, the astigmatic axis is 330=90. 2Input the obtained axis data. 32 8.Press to test the astigmatic power with astigmatism disk. Take -0.25D cylinder as increment, gradually adjust the cylindrical power until the definitions of lines to all directions in the astigmatism disc are the same. 9. Press message prompts: skip crisscross cylinder test?

When the cylindrical power is 0, message skip crisscross cylinder test? prompts. Select Yes, skip to step 14. Select No, skip to step 10. 33 10. Press and call in 0.8 sighting mark, take -0.25D sphere as increment to gradually adjust the spherical power until the patient sees the sighting mark clearly. 34 11. Press to correct right eye spherical power with red and green sighting mark (first-time red and green test). Sphere +0.50D is automatically added to blur the vision. Call in red and green sighting marks. 1Ask the patient: the letters in the red and green side of the sighting mark, which side looks more distinct?

If the letter in the red side looks more distinct: press - to increase -0.25D spherical power;

If the letter in the green side looks more distinct: press + to decrease -0.25D spherical power;

Repeat above steps until the definition of letters in the red side look the same as the definition of letters in the green side. Attention: when the definitions of letters in the red and green side can be adjusted consistent, make the letter in the red side more distinct. 35 12. Press to make the crisscross cylinder accurately test the astigmatic axis of the right eye. 1Call in speckle sighting mark and 0.25D crisscross cylinder. 2Reverse side 1 and side 2 of the crisscross cylinder, ask the patient: which side is more distinct?

When the side 1 is more distinct: enlarge the axis;

When the side 2 is more distinct: reduce the axis. 3Repeat above steps until the definitions of side 1 and 2 look the same. 36 4Click keyshift to 0.5XC. 5Click the key again, shift to automatic mode(Slit Prism). 37 13. Press to make the crisscross cylinder accurately test the astigmatic power of the right eye. 1Reverse side 1 and side 2 of the crisscross cylinder, ask the patient: which side is more distinct?

When the side 1 is more distinct: enlarge the astigmatic power;

When the side 2 is more distinct: reduce the astigmatic power. Repeat above steps until the definitions of side 1 and 2 look the same. 38 14. Press

(second-time red and green test). to correct right eye spherical power with red and green sighting mark 1Sphere +0.50D is automatically added to blur the vision. Call in red and green sighting marks. 2Ask the patient: the letters in the red and green side of the sighting mark, which side looks more distinct?

If the letter in the red side looks more distinct: press - to increase -0.25D spherical power;

If the letter in the green side looks more distinct: press + to decrease -0.25D spherical power;

3Repeat above steps until the definition of letters in the red side look the same as the definition of letters in the green side. Attention: when the definitions of letters in the red and green side can be adjusted consistent, make the letter in the red side more distinct. 39 15. Press to accurately adjust the spherical power to get the best vision of the right eye. Call in 1.0 sighting mark. Adjust spherical power, and ask the patient to keep eyes on the sighting mark. Ask the patient when the sighting mark looks more distinct. Take the lowest spherical power when the 1.0 sighting mark is clearly seen as the best vision of the right eye sphere. So far, the SUBJ test for the right eye is finished. 40 1625. Press to test the best vision of the left eye according to above step 6~15. So far, the SUBJ test for the left eye is finished. 41 26. Press to begin binocular equilibrium test (FINAL test) 1Open R and L testing windows. Call in Speckle sighting mark, and 3 face-down prism for right eye and 3 face-up prism for left eye. 2Ask the patients keep two eyes on the sighting mark and compare the definitions of upper and lower sighting marks. If the upper sighting mark is more distinct than the lower sighting mark: press + to reduce -0.25D spherical power for the right eye;

If the lower sighting mark is more distinct than the upper sighting mark: press + to reduce -0.25D spherical power for the left eye 3Repeat above steps until the definitions of two sighting marks look the same. 42 27. Binocular best vision correction Reduce the spherical powers of two eyes by -1.00D synchronically, remove the prism in the binocular testing window, call in 1.0 sighting mark; enlarge the spherical powers of two eyes by

-0.25D synchronically until the 1.0 sighting mark is clearly seen by two eyes. 43 28. Press to begin Worth 4 dots test. 1Call in red optical filter in R testing window and green optical filter in L testing window, and Worth 4 dots sighting mark. 2Confirm which points the patient can see clearly. 3Input the Worth 4 dots testing result. 44 29. Press to begin stereopsis testing. 1Call in red optical filter in R testing window and green optical filter in L testing window, and stereo sighting mark. 2Confirm if the patient can see four straight lines with stereo clearly. 3Input the stereoscopic parallax testing result. 45 30. Press message near vision test? prompts. Select Yes, skip to step 31. Select No, skip to step 34, the test is finished. 46 31. Input patient age 1Call 0.50D fixed crisscross prism in the binocular testing window. 2Input the patients age. Shift long-distance degree to correction degree. 47 32. Press to test additional degree 1Lower down the short-distance vision rod and place the visual chart in necessary working distance (generally 400mm). 2Select the crisscross matrix sighting mark on the short-distance visual chart. 3Ask the patient: the horizontal line or the vertical line, which is more distinct? Or the horizontal line and the vertical line look the same?

If the horizontal line and the vertical line look the same: there is no need to carry out near vision test and change the additional degree. If the horizontal line is more distinct than the vertical line: increase two eyes by +0.25D additional degree synchronically until the horizontal line looks as distinct as the vertical line. 48 33. Press to carry out near vision test. 1Remove 0.50D fixed crisscross cylinder. 2Select short-distance visual chart to test the vision. 3Make the patient see the sighting mark clearly to reach ideal vision value. 49 34. Press to finish the test. 50 5.5 Binocular Functional Testing Method 5.5.1 Crisscross matrix test (presbyopia) Test purpose: to test the spherical power. Test sighting mark: crisscross matric sighting mark Assistant lens: binocular 0.50D fixed crisscross cylinder 1. Binocular distant vision test is finished, add distant vision degree in the testing window. 2. Add binocular 0.50D fixed crisscross cylinder. 3. Lower down the short-distance vision rod and place the visual chart in necessary working distance (generally 400mm). 4. Select the crisscross matrix sighting mark on the short-distance visual chart. 5. Ask the patient: the horizontal line or the vertical line, which is more distinct? Or the horizontal line and the vertical line look the same?

If the horizontal line and the vertical line look the same: there is no need to carry out near vision test and wear presbyopia glasses. If the horizontal line is more distinct than the vertical line: increase two eyes by +0.25D additional degree synchronically until the horizontal line looks as distinct as the vertical line. 6. Remove 0.50D fixed crisscross cylinder. 7. Select short-distance visual chart to test the vision and slightly adjust the sphere to make the patient see the sighting mark clearly to reach ideal vision value. 5.5.2 Cross test (heterophoria) Test purpose: To test heterophoria Test sighting mark: Cross sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green cross sighting mark) Binocular circular polarized optical filter (polarized cross sighting mark) 1. Call in cross sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. 51 Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Esophoria Increase BO prismatic power until it turns into a cross Exophoria Increase BI prismatic power until it turns into a cross Left hyperphoria Right hyperphoria eye eye Increase BU prismatic power in right eye and BD prismatic power in left eye until it turns into a cross Increase BU prismatic power in left eye and BD prismatic power in right eye until it turns into a cross Esophoria + right eye hyperphoria Esophoria +

eye hypophoria left Exophoria + right eye hyperphoria Exophoria +

eye hyperphoria left Correct the horizontal heterophoria according to esophoria method vertical heterophoria according to right eye heperphpria until it turns into a cross. correct and the Correct the horizontal heterophoria according to esophoria method vertical heterophoria according to left eye heperphpria until it turns into a cross. correct and the Correct the horizontal heterophoria according to exophoria method vertical heterophoria according to right eye heperphpria until it turns into a cross. correct and the Correct the horizontal heterophoria according to exophoria method vertical heterophoria according to right eye heperphpria until it turns into a cross. correct and the Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 52 5.5.3 Cross fixation vision test (heterophoria) Test purpose: to test heterophoria Test sighting mark: cross fixation sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green cross fixation sighting mark) Binocular circular polarized optical filter (polarized cross fixation sighting mark) 1. Call in cross fixation sighting mark. 2.Ask the patient about the sighting mark he sees and test according his answers. Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Esophoria Increase BO prismatic power until it turns into a cross Exophoria Increase BI prismatic power until it turns into a cross Left hyperphoria Right hyperphoria eye eye Increase BU prismatic power in right eye and BD prismatic power in left eye until it turns into a cross Increase BU prismatic power in left eye and BD prismatic power in right eye until it turns into a cross Esophoria + right eye hyperphoria Esophoria +

eye hypophoria left Correct the horizontal heterophoria according to esophoria method and correct the vertical heterophoria according to right eye heperphpria until it turns into a cross. Correct the horizontal heterophoria according to esophoria method and correct the vertical heterophoria according to left eye heperphpria until it turns into a cross. Exophoria + right eye hyperphoria Correct the horizontal heterophoria according to exophoria method and correct the vertical heterophoria 53 according to right eye heperphpria until it turns into a cross. Correct the horizontal heterophoria according to exophoria method and correct the vertical heterophoria according to right eye heperphpria until it turns into a cross. Exophoria +

eye hyperphoria left Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 5.5.4 Cross ring test (heterophoria) Test purpose: to test heterophoria Test sighting mark: cross ring sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green cross ring sighting mark) Binocular circular polarized optical filter (polarized cross ring sighting mark) 1. Call in cross ring sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Esophoria Exophoria Left eye hyperphoria Right eye hyperphoria Increase BO prismatic power until it the cross goes in the center of the circle. Increase BI prismatic power until it the cross goes in the center of the circle. Increase BU prismatic power in right eye and BD prismatic power in left eye until it the cross goes in the center of the circle. Increase BU prismatic power in left eye and BD prismatic power in right eye until it the cross goes in the center of the circle. 54 Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 5.5.5 Horizontal coincidence test (horizontal image inequality and horizontal heterophoria) Test purpose: to test horizontal image inequality and horizontal heterophoria Test sighting mark: horizontal coincidence sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green horizontal coincidence sighting mark) Binocular circular polarized optical filter (polarized horizontal coincidence sighting mark) 1. Call in horizontal coincidence sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. 2.1 Horizontal image inequality If the sizes of the upper and lower frames are equivalent, there is no horizontal image inequality; if the sizes of the upper and lower frames are inequivalent, there is horizontal image inequality. As shown in right figure: about 3.5 image inequality. The straight line width of the sighting mark amounts to 3.5% image inequality. Horizontal heterophoria Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Esophoria Exophoria Increase BO prismatic power until it the upper frame aligns at the lower frame. Increase BI prismatic power until it the upper frame aligns at the lower frame. Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 5.5.6 Vertical coincidence test (vertical image inequality and vertical heterophoria) 55 Test purpose: to test vertical image inequality and vertical heterophoria Test sighting mark: vertical coincidence sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green vertical coincidence sighting mark) Binocular circular polarized optical filter (polarized vertical coincidence sighting mark) 1. Call in vertical coincidence sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. 2.1 Vertical image inequality If the sizes of the upper and lower frames are equivalent, there is no vertical image inequality; if the sizes of the upper and lower frames are not equivalent, there is vertical image inequality. As shown in right figure: about 3.5 image inequality. The straight line width of the sighting mark amounts to 3.5% image inequality. 2.2 Vertical heterophoria Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Right hyperphoria eye Left hyperphoria eye Increase BU prismatic power in left eye and BD prismatic power in right eye until it the left frame aligns at the right frame. Increase BU prismatic power in right eye and BD prismatic power in left eye until it the left frame aligns at the right frame. Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 5.5.7 Horizontal Maddox rod test (horizontal heterphoria) Test purpose: to test horizontal heterophoria Test sighting mark: Maddox rod sighting mark 56 Assistant lens: right eye horizontal Maddox rod, left eye rotatory prism 1. Call in Maddox rod sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Esophoria Exophoria Increase BO prismatic power for left eye until the white point coincides with the straight line. Increase BI prismatic power for left eye until the white point coincides with the straight line. Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 5.5.8 Horizontal Maddox rod test (horizontal heterphoria) Test purpose: to test horizontal heterophoria Test sighting mark: Maddox rod sighting mark Assistant lens: right eye horizontal Maddox rod, left eye rotatory prism 1. Call in Maddox rod sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Diagnosis Correction Sighting mark shape No heterophoria Align eye position, no need for correction. Left hyperphoria eye Right hyperphoria eye Increase BU prismatic power in right eye and BD prismatic power in right eye until the white point coincides with the straight line. Increase BU prismatic power in right eye and BD prismatic power in left eye until the white point coincides with the straight line. Note: When adding prismatic power, only add one eyes prismatic power instead of two eyes prismatic powers. 57 5.5.9 Clock test (rotatory heterophoria) Test purpose: to test rotatory heterophoria Test sighting mark: clock sighting mark Assistant lens: Binocular rotatory prime Right eye red optical filter, left eye green optical filter (red and green clock sighting mark) Binocular circular polarized optical filter (polarized clock sighting mark) 1.Call in clock sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Diagnosis Correction Sighting mark shape rotatory No heterophoria Align eye position, no need for correction. Idiopathic rotatory heterophoria Functional rotatory heterophoria, cant be corrected with glasses rotatory Optical heterophoria It might be caused by oblique astigmatism of human eyes or oblique cylinder of glasses. Make appropriate adjustment of cylindrical axil and power. 58 5.5.10 Worth 4 dot test Test purpose: to test binocular fusion, suppression and dominant eye. Test sighting mark: Worth 4 dots sighting mark Assistant lens: Right eye red optical filter, left eye green optical filter 1. Call in Worth 4 dots sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Dot number Sighting mark shape 4 4 3 2 5 5 Description Diagnosis Red squares and round dots, green crosses Red squares, green crosses and round dots Two eyes have fusion function Right eye is dominant eye Two eyes have fusion function Left eye is dominant eye Green squares and round dots Right eye suppression Red squares and round dots Left eye suppression Five points are seen at the same time Diplopia Flicker alternately Two red points and three green points flicker alternately Alternate suppression 3. Input the testing results. 59 5.5.11 Stereopsis Test purpose: to test stereopsis Test sighting mark: stereo sighting mark Assistant lens: Right eye red optical filter, left eye green optical filter (red and green stereo sighting mark) Binocular circular polarized optical filter (polarized stereo sighting mark) 1. Call in stereo sighting mark. 2. Ask the patient about the sighting mark he sees and test according his answers. Marks in normal eyes during test: figure 12, 3, 6, 9 and the central round point are at the same plane, and four short lines protrude outwards; the distances from the short line aside figure 12, 3, 6 and 9 to the eye are seemly shortened, and the short line aside figure 9 is the nearest. The stereoscopic parallaxes of all line are as follows:

The stereoscopic parallax between the short line aside figure 12 and the central round point is 10;

The stereoscopic parallax between the short line aside figure 12 and figure 3 is 1;

The stereoscopic parallax between the short line aside figure 3 and figure 6 is 2;

The stereoscopic parallax between the short line aside figure 6 and figure 9 is 4. 3. Input the testing results. 60 5.5.12 Divergence test Test purpose: to test the eyes congregation capability Test sighting mark: the column sighting marks in the visual chart Assistant lens: binocular rotatory prism Make sure the Congregation and divergence test parameter is set On. 1.Under prism modepresss 2. PressDivto enter divergence test. Obscure 61 Obscur Recover 3. Call in the sighting marks and display column sighting marks. 4. Increase BI prismatic power of two eyes until the sighting mark becomes obscure. Press the obscure icon, and it is highlighted, then save the prismatic power of the obscure point. 5. Increase BI prismatic power of two eyes until the sighting mark splits into two. Press the split icon, and it is highlighted, then save the prismatic power of the split point. 6. Increase BI prismatic power of two eyes until the sighting mark recovers as one. Press the recover icon, and it is highlighted, then save the prismatic power of the recover point. 5.5.13 Congregation test Test purpose: to test the eyes congregation capability Test sighting mark: the column sighting marks in the visual chart Assistant lens: binocular rotatory prism Make sure the Congregation and divergence test parameter is set On. 1 Press Con to enter divergence test. Obscur Obscure Recover 2.Call in the sighting marks and display column sighting marks. 3. Increase BO prismatic power of two eyes until the sighting mark becomes obscure. Press the obscure icon, and it is highlighted, then save the prismatic power of the obscure point. 4. Increase BO prismatic power of two eyes until the sighting mark splits into two. Press the split icon, and it is highlighted, then save the prismatic power of the split point. 5. Increase BO prismatic power of two eyes until the sighting mark recovers as one. Press the recover icon, and it is highlighted, then save the prismatic power of the recover point. 62 5.5.14 Near point congregation (NPC) test No vision tester is needed in the test. If the patient wears glasses, do not take them off. Test purpose: to test split point Test sighting mark: cross fixation sighting mark, or nib that can easily cause diplopia. 1. Press choose Near Point 2 NPC, NPA, NRA, PRA showing simultaneously, to shift to short-distance mode. 3. Put the nib in the right front of the patient and make the patient keep eyes on the nib. 63 4. Move the nib gradually to approach to the patients eyes: when the patient sees the nib becomes two from one, stop moving the nib. 5. Measure the distance from the nib to the nose root of the patient. 6. Input the distance (in cm) into the input frame, the meter angle and prismatic power will be calculated automatically. 5.5.15 Near point adjustment (NPA) test Test purpose: to test near-point adjustment Test sighting mark: Letter sighting mark of short-distance visual chart. Confirmation before test: Set SPH distant vision near vision to SPH+ADD. 1. Press shift to short-distance mode.

,choose Near Point, NPC, NPA, NRA, PRA showing simultaneously, to 2. Press NPA to open binocular testing window. 3. Place the visual chart in the distance of 40cm, make sure the patient see clearly the letter sighting mark with best vision. 3. Move the visual chart gradually to approach to the patients eyes: when the sighting mark becomes obscure, stop moving the visual chart. 4. Measure the distance from the visual chart to the nose root of the patient. 5. Input the distance (in cm) into the input frame, the near-point adjustment value will be calculated automatically. 5.5.16 Negative-relative adjustment (NRA) test Test purpose: to test the negative-relative adjustment when the two eyes congregate in specified working distance Test sighting mark: column sighting marks in short-distance visual chart 64 Confirmation before test: Set SPH distant vision near vision to SPH+ADD. 1. Press

, choose Near Point, NPC, NPA, NRA, PRA showing simultaneously, to shift to short-distance mode. Obscur Recover 2. Press NPA to open binocular testing window. 3. Place the visual chart in the distance of 40cm, make sure the patient see clearly the column sighting marks. 4. Press + and - to gradually adjust the spherical power until the sighting mark becomes obscure. Press the obscure icon, and it is highlighted, then save the prismatic power of the obscure point. 5. Press + and - to gradually adjust the spherical power until the sighting mark becomes distinct again. Press the recover icon, and it is highlighted, then save the prismatic power of the recover point. 5.5.17 Positive-relative adjustment (PRA) test Test purpose: to test the positive-relative adjustment when the two eyes congregate in specified working distance Test sighting mark: row sighting marks in short-distance visual chart Confirmation before test: Set SPH distant vision near vision to SPH+ADD. 1. Press shift to short-distance mode.

, choose Near Point, NPC, NPA, NRA, PRA showing simultaneously, to 65 Obscur Recover 2. Press NPA to open binocular testing window. 3. Place the visual chart in the distance of 40cm, make sure the patient see clearly the row sighting marks. 4. Press + and - to gradually adjust the spherical power until the sighting mark becomes obscure. Press the obscure icon, and it is highlighted, then save the prismatic power of the obscure point. 5. Press + and - to gradually adjust the spherical power until the sighting mark becomes distinct again. Press the recover icon, and it is highlighted, then save the prismatic power of the recover point. 5.6 Customer Self-programming The device has standard optometry procedure A as factory default setting. There are four optometry procedures can be programmed by the customer. 5.6.1 Self-programming 1. Press in the main interface to enter system parameter setup interface. 2. Select Program to enter self-programming interface. 66 3. Program 1)A B C D are recommended vision test steps, users can also add or delete as needed. 67 2)E F G H are empty status, users can customize all the steps by themselves. 3)Keys Introduction Edit Key: Click it to enter program customizing interface Clear Key: Click it to delete this step. 68 Add Key: Click it to add one step automatically. 4Click key to enter program customizing interface 69 5Headline can be input into the Program E box. According to users need, Editting the vision test program and then click OK key to save the setting. 70 5.6.2 Run Customized Program 1Go back to Measurement Interface. Click key to popup the program choice box 2Choose Program E. 71 3Click key to start to run customized program. 5.7 Communication 5.7.1 Communication with Lensmeter CCQ-800 1) Use special communication cable to connect CCQ-800 to the R232 port of the print box. 2) Click LM key 72 3) Click key to popup input box 73 4) Use CCQ-800 lensmeter to test lens data and convey the date to YPA-2100 5Click key . 6) Choose No00001. 74 7) Click key to complete data import. 75 5.8 Pre-set ADD Relationship table between pre-set additional degree ADD and patient age (only applies to this product) Age 45 at oldest 50 at oldest 55 at oldest 60 at oldest 65 at oldest Older than 65 N/A Pre-set ADD degreem-1 0.75 1.25 1.50 1.75 2.00 2.25 Un-pre-set ADD degree 6.Troubleshooting In the event of device trouble, please check the device as per below chart to obtain guidance. If the trouble is not shot, please contact with Chongqing Yeasn Science & Technology Co., Ltd. Maintenance Department or the authorized dealer. Trouble Reasons Solutions Remark The device doesnt start The power line is not correctly connected to the socket Connect the power line correctly The printer doesnt exit paper Printing papers are used out printing Replace papers The printer doesnt print results Printing papers are installed in opposite direction. Adjust the direction of printing papers 76 7.Cleaning and Protection Attention: Do not use any corrosive detergent to clean the device, so as not to damage the device surface. 7.1 Clean the forehead baseplate Clean the forehead baseplate before every optical test. 1Take off the forehead baseplate Tilt the forehead baseplate forward as shown in right figure: drag in a certain direction and take off the baseplate. 2Clean the forehead baseplate Wipe the forehead baseplate with clean and soft cloth. For intractable stains, please dip the clean soft cloth in mild detergent to scrub the stains away and then wipe it with dry soft cloth. 3Restore the forehead baseplate to original position Insert it into the device in a certain direction 7.2 Clean the nose baseplate Clean the nose baseplate before every optical test. 1Take off the nose baseplate from the vision tester host. The nose baseplate is fixed on the vision tester host with magnetic steel, so it can be easily taken off. 2Clean the nose baseplate. Wipe the nose baseplate with clean and soft cloth. For intractable stains, please dip the clean soft cloth in mild detergent to scrub the stains away and then wipe it with dry soft cloth. 3Restore the nose baseplate to original position 7.3 Clean the testing window If there are dirt, oil stain, finger print or dust on the testing window, it may affect the testing accuracy. 1For the dust: blow it away with blowing balloon with brush. 2For dirt, oil stain and finger print: wipe it with clean and soft cloth. 77 Attention: Do not wipe the testing window with stiff cloth or paper; otherwise it may scratch the testing window glass. Attention: Wipe the testing window gently when cleaning it. Otherwise, it may scratch the testing window glass. 7.4 Clean external parts When the external parts, such as the enclosure or panel, get dirty, please wipe them gently with clean and soft cloth. For intractable stains, please dip the clean soft cloth in mild detergent to scrub the stains away and then wipe it with dry soft cloth. 78 8.Maintenance and Care Cover Printing bin key 8.1 Replace printing papers When a red line occurs aside the printing paper, please stop using the printer and replace printing papers. Replacing steps are as follows:

1)Press the printing bin button to open the printer cover. 2)Take out the left paper and put in the new printing paper. Attention: Pay attention to the paper rolls direction. If the paper roll is installed reversely, the printer wont print any data. 3)Put the printing paper through the paper exit and then close the printing cover. Attention: Pay attention to the paper rolls direction. Do not print when there is no printing paper or pull the printing paper effortlessly, otherwise it may shorten the printers service life. Printing papers direction 79 Paper exit Press the print cover, be sure the "Printing bin key" is to the pop-up state, otherwise it will not be able to print. 8.2 Repairable and replaceable parts, such as printing base and power adapter, etc., provided by the company can only be used; other unauthorized parts may reduce the minimum safety of the device. 8.3 The fuse of the device is included in the power adapter; if damaged, please replace it with the power adapter provided by the company with fuse type of T3.15A/250V. 8.4 Do not disassemble or repair the device arbitrarily when a failure occurs, please contact with local dealer or manufacturer. 8.5 The company is committed to providing users with necessary circuit diagrams, part list and other relevant materials as needed. 9. Environmental Conditions and Service Life 1Environmental conditions for normal operation Environment temperature: 10~35 Relative humidity: 30%~80% (no condensation) Atmospheric pressure: 800hPa~1060hPa Indoor conditions: clean and without direct high light. 2Environmental conditions for transportation and storage Environment temperature: -10~+55 Relative humidity: 10%~85% (no condensation) Atmospheric pressure: 700hPa~1060hPa 3Service life The service life of the device is 8 years from first-time use with proper maintenance and care. 80 10.Environmental Protection Please recycle or properly dispose of the used batteries and other wastes to protect the environment;

please package the device at the end of life to the company, or handle it in accordance with local provisions related to environmental protection. 11.Manufacturers Responsibility The company is responsible for the safety, reliability and performance impact under below circumstances:

Assembly, addition, modifications, alterations and repairs are carried out by authorized personnel by the company;

Electrical facilities in the room are in conformity with relevant requirements, and The device is used according to the User Manual. 12.Symbol Description The applied part of the device is Type B Attention! Please refer to accompanying documents. Refer to instruction manual/ booklet Manufacture date MFG. DATE Manufacture date Manufacturer European certicate of conformity Correct Disposal of This Product (Waste Electrical & Electronic Equipment) Statement:

Contact the local authorities to determine the proper method of disposal of potentially bio-hazardous parts and Accessories. Product serial number 81 13.Electrical Schematic Diagram For further information and services, or any questions, please contact with the authorized dealer or manufacturer. We will be happy to help you. 82 14.Electromagnetic Compatibility Guidance and Manufacturers Declaration Electromagnetic Emissions This device is intended for use in the electromagnetic environment specified below. The customer or the user of the devices should assure that the device is used in such an environment. Emissions test Compliance Electromagnetic environment - guidance RF emissions GB 4824CISPR 11 Group 1 The device uses RF energy only for its internal function. Therefore, its RF emissions are very low and not likely to cause interference in nearby electronic equipment. RF emissions GB 4824CISPR 11 Harmonic emissions GB 17625.1 Voltage Fluctuations/Flicker GB 17625.2 IEC 61000-3-3 Class B Class A Complies The device is suitable for use in all establishments, including domestic establishments and those directly connected to the public low-voltage network that supplies building used for domestic purposes. 83 Guidance and Manufacturers Declaration Electromagnetic Immunity This device is intended for use in the electromagnetic environment specified below. The customer or the user of the devices should assure that the device is used in such an environment.

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Electromagnetic environment guidance Floor should be wood, concrete or ceramic tile. If floors are covered with the relative humidity should be at least 30%. synthetic material, Mains power quality should be that of a typical commercial or hospital environment. Mains power quality should be that of a typical commercial or hospital environment. Mains power quality should be that of a typical commercial or hospital environment. If the user of the device requires continued operation during power mains interruptions, it is recommended that the device be powered from an uninterruptible power source. Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial hospital environment. or Immunity test Electrostatic dischargeESD GB/T 17626.2 IEC61000-4-2 IEC60601 Test level Compliance level 6kV Contact 8kV Air 6kV Contact 8kV Air Electrical fast transient/burst GB/T 17626.4 IEC61000-4-4 2kV for supply lines 1kV for output lines power input/

2kV supply lines 1kV for output lines for power input/

1kV line to line 2kV line to earth 1kV line to line 2kV lien to earth

<5% Ut (>95% dip in Ut) for 0.5 cycle 40% Ut (60% dip in Ut) for 5 cycles 70% Ut (30% dip in Ut) for 25 cycles

<5% Ut (>95% dip in Ut) for 5 sec 1kV line to line 2kV line to earth

<5% Ut (>95% dip in Ut) for 0.5 cycle 40% Ut (60% dip in Ut) for 5 cycles 70% Ut (30% dip in Ut) for 25 cycles

<5% Ut (>95% dip in Ut) for 5 sec 3 A/m 3 A/m Surge GB/T 17626.5 IEC61000-4-5 Voltage dips, short interruptions and voltage variations on power supply input lines GB/T 17626.11 IEC61000-4-11 Power frequency magnetic field 50/60Hz GB/T 17626.8 IEC 61000-4-8 Note: Ut is the AC mains voltage prior to application of the test level. 84 Guidance and Manufacturers Declaration Electromagnetic Immunity This device is intended for use in the electromagnetic environment specified below. The customer or the user of the devices should assure that the device is used in such an environment. Immunity test IEC60601 Test level Compliance level Conducted RF GB/T 17626.6 IEC61000-4-6 Radiated RF GB/T 17626.3 IEC61000-4-3 3 V (effective value) 150kHz - 80MHz 3 V/m 80MHZ - 2.5GHZ 3 V 3V (effective value) 3 V/m

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and mobile the device, than Electromagnetic environment guidance RF Portable equipment communications should be used no closer to any part of including cables, the recommended separation distance calculated from the equation applicable to the frequency of the transmitter. Recommended separation distance d =1.2 150kHz-80MHz d =1.2 80MHz-800MHz d =2.3 800MHz-2.5GHz Where:

P is the maximum output power rating of the transmitter in watts

(W) according to the transmitter manufacturer;

D is the recommended separation distance in meters (m). Field strengths from fixed RF transmitters, as determined by an a electromagnetic should be less than the compliance level in each frequency range b. Interference may occur in the vicinity of equipment marked with the following symbol. survey site Note 1: At 80MHz and 800MHz, the higher frequency range applies. Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection structures, objects and people. a Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured filed strength in the location in which the device is used exceeds the applicable RF compliance level above, the device should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the device. b Over the frequency range 150 KHz to 80MHz, field strengths should be less than 10V/m. 85 Recommended separation distances between portable and mobile RF communications equipment and the device These devices are intended for use in an environment in which radiated RF disturbances are controlled. The customer or the user of the device can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the device as recommended below, according to the maximum output power of the communication equipment. Rated maximum output power of transmitter W Separation distance according to frequency of transmitter/m 800MHz - 2.5GHz 80MHz - 800MHz 150kHz - 80MHz 0.01 0.1 1 10 100 d = 1.2 0.12 0.38 1.2 3.8 12 d = 1.2 0.12 0.38 1.2 3.8 12 d = 2.3 0.23 0.73 2.3 7.3 23 For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m) can be determined using the equation applicable to the frequency of the transmitter, where P is the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer. Note 1: At 80MHz and 800MHz, the separation distance for the higher frequency range applies. Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people. 86