Nidek Medical ARK-1S, Operator'S Manual

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OPERATING PROCEDURE: Accommodation Measurement
3.7 Accommodation Measurement
1
After AR measurement, press the accommodation measurement button to dis-
play the accommodation measurement screen (ACCOMMODATION).
The initial measurement conditions are “HOME (reference
position) = SPH value” and “TPOS (initial position) = SPH
value +0.50 D
*1
” (0.01 D increments each).
To change the reference position, use the up button or
down button (0.25 D increments)
.
The 0.63
*2
VA chart is presented to the patient. Instruct the
patient to begin and continue looking at the chart from the
start of measurement. Measurement continues for a maxi-
mum of 30 seconds.
2
Manipulate the joystick to perform alignment and focusing of the patient’s eye.
3
Press the start button on the joystick to start mea-
surement.
With auto shot on, measurement does not start unless align-
ment and focusing are achieved.
While the chart is moved from the initial position, successive
AR measurements are taken. If the patient’s eye cannot
accommodate to the chart position (TPOS) for a continuous 6
seconds, measurement finishes. (The elapsed time is dis-
played in the TIME field.)
Once measurement starts, AR-measured values and the
pupil size are successively displayed along with the graph.
When measurement is complete, a beep sounds and the
screen display stops updating.
*1. The setting of TPOS (shift amount from SPH) can be set by the “132. T. POSITION” parameter.
*2. The chart presented to the patient can be changed by the “133. CHART” parameter.
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STOP Displayed during measurement. Press the corresponding button to interrupt mea-
surement. “RESET” is displayed above the joystick icon. Pressing the start button
resets the chart and returns to the pre-measurement condition.
Return
Returns to the AR (AR/KM) measurement screen.
Graph
Displays the graph display screen.
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