Nidek Medical RT-5100, Руководство оператора

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• When the patient cannot see the horizontal and vertical lines equally, change the addition
power so that the horizontal lines appear sharper than the vertical ones.
• To continuously perform visual acuity test with addition powers, follow "4.1.3 Visual Acuity
Test with Addition Powers" (page 153).
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OPERATING PROCEDURE Standard Program Refraction
19
Check the near visual acuity.
1) Press .
The cross cylinder lenses are removed.
Set the near point chart II Letters chart at a
position of 40 cm manually.
2) Measure the visual acuity chart for right
eye, left eye, and both eyes.
Press , , or to enter the
VA value by turning the dial.
The VA value cannot be entered with the
mask buttons such as
or .
20
Select whether the Night measurement test is performed or not.
1) Press .
The "Night vision test?" message appears.
2) Select whether the Night vision test is
performed or not.
Perform Night vision test
ψ
Select [Yes].
Do not perform Night vision test
ψ
Select [No]. Program is finished.
Then, Night measurement starts.
The chart becomes the brightness for Night.
• Darken the room for Night measurement. It is recommended to take time to adjust the
patient's eye to the darkness.
21
Check the VA when the chart is darkened
with the full corrected power lens in Day
mode inserted. Perform the subjective
refinement based on the day data and print
the measured result.
1) Press
The isolated 20/20 line is presented.
2) Check the best possible visual acuity
with or .
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