Division Description Test method
Aniseikonia
test
This test is for
checking Aniseikonia of
right or left eye using
Red/Green filter.
1. Show Aniseikonia test type.
2. Let a patient wear Red/Green glasses (right eye = red filter, left
eye = green filter). The patient sees fixation target and « ] » in a
right eye and fixation target and « [ » in a left eye.
3. Ask a patient if he can see borders that have in between interval.
Also asking if a left and a right border are alike or which one is shown
smaller than the other.
When (-) diopter of right eye is higher than left eye.ⓐ
Ex: O.D : S -7.00 / O.S : S -2.00
When (-) diopter of left eye is higher than right eye.ⓑ
Ex: O.D : S -2.00 / O.S : S -7.00
4. The reason of Aniseikonia is heteropsia (when diopter's difference
of both a right and a left eye is too big).
Prescribe size lens or contact lens.
Division Description Test method
Phoria test -
(Cross phoria)
This test is for testing
horizontal/vertical
phoria 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.
Patient's
visual status
Phoria Method
Esophoriaⓐ
Add B.O prism until a vertical line can
come to the center of a horizontal
line.
Exophoriaⓑ
Add B.I prism until a vertical line can
come to the center of a horizontal
line.
Left eye'sⓒ
hyperphoria
Right eye's
hypophoria
Add B.U in a right eye or B.D in a left
eye until a horizontal line can come to
the center of a vertical line.
Right eye'sⓓ
hyperphoria
Left eye's
hypophoria
Add B.U in a left eye or B.D prism in
a right eye until a horizontal line can
come to the center of a vertical line.
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