3
BEFORE USE
Configuration
1
1. Measuring window
The patient looks at any chart through these windows.
2. Near point lamp
Illuminates the near point chart.
The lamp lights up or goes out with [Near Lamp] on the window shown by pressing the left side switch of the control
box.
3. VD check window
Used to check the patient's VD (vertex distance = distance from the corneal apex to the lens).
The windows have calibration markings of 12, 13.75, 16, 18, and 20 mm.
4. Forehead rest detection lamp
Used to make sure that the patient's forehead contacts the forehead rest.
When the forehead is away from the forehead rest, the lamp lights up.
5. Forehead rest knob
Moves the forehead rest forward and backward in order to adjust the VD.
6. Level
Used to make sure that the refractor head is level.
Turn the level adjustment knob until the air bubble is centered in the level.
7. Near point chart
Chart number
Chart name on the reverse side
Chart
, Near point chart II (Near point chart II
is only for Plus Package)
Used for the near vision test to measure addition powers.
When the chart is shifted to the left slightly, the chart
explanation is indicated.
Chart explanation
For the chart on the near point chart or near point chart II, see “8.9 Near Point Chart (Standard)” (page 277) and
“8.10 Near Point Chart II” (page 279).
• When switching the near point chart, do not rotate the near point chart while pressing the
chart window frame.
The near point chart may be rubbed off and become difficult to be seen.
8. Near point rod
The distance from the patient's eye to the near point chart is
marked in inches and centimeters.
Adjust the chart to the
desired distance and
tighten the knob.
• Align the black line at the near point chart holder with the scale of
the desired distance.
• The number in red represents the power (diopter) corresponding to
each distance in meters.
• Rotating the rod 180 degrees and inverting it up side down
changes the scale from between centimeters and inches. See “1.6
Before First Use” (page 25).
9. Level adjustment knob
Adjusts the level of the refractor head.
The refractor head is tilted by 2.5° at maximum to the left or right.
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