Essilor Instruments CS POLA 600, User Manual, Page: 40 / 62

Division Description Test method
Phoria test -
(Fixation point of
cross phoria)
This test is for
measuring
vertical/horizontal
fixation disparity of
right or left eye by
using Red/Green
filter.
1. Show cross phoria test type to a patient.
2. Let a patient wear Red/Green glasses (right eye = red filter, left
eye = green filter). The patient sees « » mark in a right eye and
« » mark in a left eye on cross phoria test type. The binocular
condition would be ideal, if the patient could see « » mark.
3. Judge a patient's binocular function as below, while asking him
how the type is seen.
Patient's
visual status
Fixation disparity Method
Esodisparity ⓐ
Add B.O prism until being no
deviation.
Exodisparity ⓑ
Add B.I prism until being no
deviation.
Left eye's ⓒ
hyperdisparity
Right eye's
hypodisparity
Add B.U in a right eye or B.D
in a left eye until being no
deviation.
Right eye's ⓓ
hyperdisparity
Left eye's
hypodisparity
Add B.U in a left eye or B.D
prism in a right eye until
being no deviation.
CSPOLA600 - Polarized visual chart system > V5 - 03-2018
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U
SER MANUAL
> VII. T
EST METHOD