66
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.
Obscur
Recover
Summary of Contents for YPA-2100
Page 1: ...YPA 2100 DIGITAL REFRACTOR User Manual Version 1 0 Date 20180521...
Page 5: ...13 Electrical Schematic Diagram 82 14 Electromagnetic Compatibility 83...
Page 24: ...19 Press to enlarge PD press to reduce PD 3 Press to exit PD input interface...
Page 31: ...26 key...
Page 42: ...37 4 Click key shift to 0 5XC 5 Click the key again shift to automatic mode Slit Prism...
Page 55: ...50 34 Press to finish the test...
Page 78: ...73 3 Click key to popup input box...