Topcon Compu-Vision CV-5000 User Manual

102
5. OPERATION FOR TESTS
3 Check the vertical aniseikonia.
When the patient sees the test chart through the polarized filter, the center fixation target
is seen by both eyes as shown below. In addition, the left half is seen by the left eye and
the right half, by the right eye.
When the patient does not have vertical aniseikonia, he/she sees the right and left
images appear same size.
When the patient has vertical aniseikonia, he/she sees the right and left images in differ-
ent sizes.
4 Record the vertical aniseikonia degree.
Have the patient answer whether the right and left images are different in size. If so,
have the patient view the opening of the right and left images and answer how much the
lines are disparate to each other.
When the disparity at one side is about half a line, the patient should answer "half a line".
When it is about one line, the patient should answer "one line".
When the left image is larger than the right one by one line, click the [L>R 1.0] button to
record the value.
When the left image is larger than the right one by half a line, click the [L>R 0.5] button to
record the value.
When the right image is larger than the left one by one line, click the [L<R 1.0] button to
record the value.
When the right image is larger than the left one by half a line, click the [L<R 0.5] button to
record the value.
When the right and left images have same size, click the [L=R] button to record the
value.
When disparity of half a line is checked, the magnification is different by 3.5% between
the images of right and left eyes. When disparity of one line is checked, it is different by
7.0%.
Chart seen by
left eye
Chart seen by
right eye
Chart seen by
the eyes with-
out vertical
aniseikonia
Disparity by
half a line
(Example of
"L>R")
Disparity by
one line
(Example of
"L>R")

Topcon Compu-Vision CV-5000 Specifications

General

Brand	Topcon
Model	Compu-Vision CV-5000
Category	Medical Equipment
Language	English