44
OPERATING PROCEDURE: Corrected Visual Acuity Measurement (Subjective Refractive Error Measurement)
O
Vision comparison function (during near visual acuity measurement)
The vision of the near VA chart with the corrected distance values (or corrected near values with addi-
tion power) and uncorrected vision (or vision corrected by LM data) are switched to check the vision
difference.
Setting the “96. NEAR RECALL” parameter to “YES” in advance displays the recall
button
(or
) for vision comparison.
O
Changing the near working distance
The near working distance can be changed during near visual acuity measurement.
Setting the “97. WD CHANGE” parameter to “YES” changes the near icon from
to
,
which allows the near working distance to be changed.
Holding down the near
button for about a second
changes the icon as shown to the right indicating WD change
mode.
Change the near working distance with the up button
or down button.
(5 cm increments)
Pressing the near
button again exits from WD change
mode.
Recall
When LM data is not contained
The near VA chart is viewed with an uncorrected eye.
Recall
When LM data is contained (no addition power)
The distance power lens of LM data is inserted and the near VA chart is viewed
with the distance power.
When LM data is contained (with addition power)
The addition power lens of LM data is inserted and the near VA chart is viewed
with the addition power. If the second addition power (ADD2) is contained, the
second addition power lens is inserted.
Corrected distance values and addition
power
Uncorrected vision (0 D) or LM values
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• When R or L of the eye to be measured is switched, the WD value set before switching is displayed.
Summary of Contents for ARK-1S
Page 1: ...AUTO REF KERATOMETER AUTO REF KERATOMETER ARK 1s ARK 1s OPERATOR S MANUAL OPERATOR S MANUAL ...
Page 6: ...IV ...
Page 76: ...70 OPERATING PROCEDURE Operation when Peripheral Devices are Connected ...
Page 112: ...106 SPECIFICATIONS AND TECHNICAL INFORMATION EMC Electromagnetic Compatibility ...