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Usage guide
Using charts for measuring binocular visual functions
Chart
Polarized R and G tes
t Binocular balance test Worth four dot test Cross ring test
A, C, F type
A, B, *F, *H C type
type
A, C, F, H B type
type
Filter
Polarizing filters Polarizing filters
Red filter for the right eye and
green filter for the left eye
Red filter for the right eye and
green filter for the left eye
Purpose
Test of binocular refrac-
tion and accommoda-
tion balance
Test of the final binocular refrac-
tion balance
Test of the function of binocular
fusion
Test of the presence and
level of latent heteropho-
ria
Right
eye
Left
eye
The right eye is over cor-
rected and the left eye is
under corrected.
The left eye is over cor-
rected and the right eye
is under corrected.
The binocular refraction
and accommodation bal-
ance are achieved when
the two reds or two
greens are seen at the
same intensity.
There is a variance of degree
between the right eye and the left
eye.
Adjust the spherical power to
provide binocular balance.
*The Characters used in the F
and H types are not the same as
those shown above.
In the case where 4 dots are
seen, there will be normal fusion.
The white (bottom) color indi-
cates which eye can see better. If
red is seen mixed with green, the
right and left eyes function at the
same level.
If only two targets are seen, the
left eye is suppressed.
If only three green targets are
seen, the right eye is suppressed
If five targets are seen, it indi-
cates that the patient has diplo-
pia.
Indicates exophoria of 3
prisms.
Indicates esophoria of 2
prisms.
Indicates left eye hyper-
phoria of 1 prisms.
Indicates left hypopho-
ria of 0.5 prisms.
How the charts are viewed
How the charts are seen binocularly
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