
58
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.
Sighting
mark shape
Diagnosis Correction
No rotatory
heterophoria
Align eye position, no need for correction.
Idiopathic rotatory
heterophoria
Functional rotatory heterophoria, can’t be corrected
with glasses
Optical rotatory
heterophoria
It might be caused by oblique astigmatism of human
eyes or oblique cylinder of glasses. Make appropriate
adjustment of cylindrical axil and power.
Содержание YPA-2100
Страница 1: ...YPA 2100 DIGITAL REFRACTOR User Manual Version 1 0 Date 20180521...
Страница 5: ...13 Electrical Schematic Diagram 82 14 Electromagnetic Compatibility 83...
Страница 24: ...19 Press to enlarge PD press to reduce PD 3 Press to exit PD input interface...
Страница 31: ...26 key...
Страница 42: ...37 4 Click key shift to 0 5XC 5 Click the key again shift to automatic mode Slit Prism...
Страница 55: ...50 34 Press to finish the test...
Страница 72: ...67 3 Program 1 A B C D are recommended vision test steps users can also add or delete as needed...
Страница 74: ...69 Add Key Click it to add one step automatically 4 Click key to enter program customizing interface...
Страница 78: ...73 3 Click key to popup input box...
Страница 79: ...74 4 Use CCQ 800 lensmeter to test lens data and convey the date to YPA 2100 5 Click key 6 Choose No00001...
Страница 80: ...75 7 Click key to complete data import...