38
13. Press to make the crisscross cylinder accurately test the astigmatic power of the right
eye.
1
）
Reverse 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.
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...