Nidek Medical RT-5100, Руководство оператора

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OPERATING PROCEDURE Standard Program Refraction
2
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Perform the stereo test.
1) Press
The polarizing filters are placed in the mea-
suring windows.
Right eye: 135°, Left eye: 45°
The stereo test chart is presented.
The fog which has been applied during the
binocular balance test is automatically
released.
2) Confirm that the patient can see four
vertical lines stereoscopically.
Enter the recognized stereoparallax with the
function button. For a patient who cannot see those lines stereoscopically, perform the binocular
visual function test as necessary. See "4.4 Binocular Visual Function Test" (page 163).
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Measure the best possible visual acuity for both eyes.
1) Press .
The isolated 20/20 line is presented.
2) Check the best possible visual acuity
with or .
3) Refine the spherical power to achieve
the best possible visual acuity with the
most plus power.
Turn the dial counterclockwise to add
approximately SPH +0.25 D. When the
chart appears blur, turn the dial clockwise
one increment.
• Instead of the above procedure, the best possible visual acuity can be determined as
follows:
When releasing the fogging, give the patient sufficient time to view the VA chart.
(1) Add approximately SPH +0.75 D of fogging.
(2) Present a visual acuity chart for which the visual acuity is decreased by a few increments.
(3) When the patient can read the VA chart, press to increase the visual acuity. When
they cannot read the chart, add SPH -0.25 D to release the fogging and ask them to read it
again.
Repeat the procedure to determine the best possible visual acuity with the most plus spherical
power.
The night spherical power for both eyes is perfectly refined.
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Press .
This completes Program .
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