Nidek Medical RT-5100, Руководство оператора

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51
OPERATING PROCEDURE Standard Program Refraction
2
Remove the refractor head and check the viewability or visual acuity with a trial frame as
necessary.
22
Select whether the near vision test is performed or not.
1) Press .
The “Near Vision test?” message appears.
2) Select whether the near vision test is
performed or not.
Perform the near vision test.

Select [Yes]. The cross cylinder lenses
are placed and near point lamp lights up.
Cancel the near vision test.

Select [No]. Program A is finished. Go to
Step 28.
23
Enter the patient’s age.
Select the age with the function buttons.
If age is already input, go to Step 24.
Go to Step 24 when the “Preset ADD
parameter” is set to No.
The far powers are switched to the full cor-
rection powers to measure the addition
powers accurately.
The refractor head converges.
• When the refractor head is converging, have the patient off their face temporarily from the
refractor head.
24
Pull down the near point rod and set the near point chart to the desired working distance
(normally 40 cm).
25
Measure the addition powers.
1) Select the cross-grid chart on the near
point chart.
2) Ask the patient, “Which lines are
sharper, the horizontal or vertical ones?
Or are they about the same?”
Horizontal lines

Turn the dial counter-
clockwise in 1 increments until the lines
appear equal.
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