Nidek Medical RT-5100, Руководство оператора

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OPERATING PROCEDURE Preparation
2.4 Preparation
1
Place the refractor head in front of the patient’s eyes.
1) Clean the forehead rest, face shields, and measuring windows beforehand.
See "6 MAINTENANCE" (page 249).
2) Instruct the patient to lean against the forehead rest and look through the measuring win-
dows.
Confirm that the forehead detection lamp goes out. When it lights up, the patient’s forehead is away
from the forehead rest.
• The forehead rest is for positioning the patient’s forehead. Be careful that the patient does
not push against the forehead rest.
If the forehead rest is pressed against too strongly, the support of the forehead rest may be broken.
• If the forehead rest is set too far to the patient side, the patient may force his/her forehead
against the forehead rest to approach the measuring window and the support may be
broken. If the forehead rest is too far to the patient side, before the patient positions his/her
forehead, retract the forehead rest with the forehead rest adjustment knob.
2
Press .
The PD adjustment lenses are placed in the measuring windows and the anterior segments
of the patient’s eyes are lighted.
3
Observe the patient’s eyes from the operator’s side.
Confirm that both eyes are located in the center of each measuring window.
A. When they are shifted horizontally: Turn the dial to adjust the pupillary distance (PD).
B. When either eye is shifted vertically: The patient’s head is tilted. Instruct the patient to
make the head level.
4
Adjust the vertex distance (VD).
1) Look through the VD check windows.
VD 12 mm
VD 13.75 mm
VD 16 mm
VD 18 mm
VD 20 mm
The windows are located on both sides of the
refractor head.
2) Align the patient’s corneal vertex to the
desired VD marking.
Turn the forehead rest knob.
5
Press again.
The PD adjustment lenses are removed from the measuring windows and the light goes off.
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