72
OPERATING PROCEDURE
Standard Program Refraction
15
Enter the patient’s age.
Select the age with the function buttons.
If age is already input, go to Step 16.
Go to Step 16 when the “Preset ADD”
parameter is set to No.
The refractor head converges.
• When the refractor head is converging, have the patient off his face temporarily from the
refractor head.
16
Pull down the near point rod and set the near point chart to the desired working distance
(normally 40 cm).
17
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.
Vertical lines
Turn the dial clockwise in 1
increments until the lines appear equal.
Same
It is not necessary to change the addition powers.
• 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.
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Содержание RT-5100
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Страница 46: ...28 BEFORE USE Getting Started and Exiting 161221687130 承認済 Uncontrolled copy when printed ...
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