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5. OPERATION FOR TESTS
4 Measure the fixation disparity degree in the horizontal direction.
If the patient has fixation disparity in the horizontal direction, measure its value.
If the mouse operation mode is not set to "Horizontal prism", click the [H/V] button on the
control window to change the mode.
Have the patient view the vertical lines. Ask the patient which direction the upper vertical
line is compared to the lower vertical line, right or left.
When the upper vertical line is at the left against the lower vertical line, click the left
mouse button for the mouse navigation until the upper and lower vertical lines appear
aligned.
When the upper vertical line is at the right against the lower vertical line, click the right
mouse button for the mouse navigation until the upper and lower vertical lines appear
aligned.
5 Measure the fixation disparity value in the vertical direction.
If the patient has fixation disparity in the vertical direction, measure its value.
If the mouse operation mode is not set to "Vertical prism", click the [H/V] button to
change the mode.
Have the patient view the horizontal lines. Ask the patient which direction the right hori-
zontal line appears, under or above the left horizontal line.
When the right horizontal line is under the left horizontal line, click the left mouse button
for the mouse navigation until the right and left horizontal lines appear aligned.
When the right horizontal line is above the left horizontal line, click the right mouse but-
ton for the mouse navigation until the right and left horizontal lines appear aligned.
5.3.2 CONVERGENCE/DIVERGENCE
Measure the convergence and divergence of the patient. The result is used as a reference value
when the heterophoria of the patient is corrected.
The result of the test is recorded by clicking the function buttons.
1 Prepare for the test.
This test must be executed in the condition that abnormal refraction has been com-
pletely corrected. If abnormal refraction is not corrected yet, correct it before this test.
2 Select "Convergence/Divergence" from "Examination list".
To perform this test, specify the test name from "Examination list".
Click the [Examination list] button to display "Examination list".
Click the [Bino] tab and select "[F] Convergence/Divergence[#9, 10, 11]" from the list.
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