3.4.2
Put the nose bearer lightly on testee’s nose bridge and keep the device in a
horizontal state.
3.4.3
Let the testee stare at the staring target of the device.
Important Matters
In the process of measurement (and the measurement of monocular pupillary distance
described in the following section), to achieve precise data of measurement and make
process of measurement easily and quickly, the tester should remind the testee to
always stare at the Staring Target in a level state, without moving his (her) eyeballs.
3.4.4
The tester observes the reflecting bright dot on the testee’s pupil through
measuring window. Press the Left and Right Pupils Measuring Keys, the left and
right pupillary distance pointers will coincide the reflecting bright dots of the
testee’s left and right pupils, respectively. The datum shown in the display window
is just the measured pupillary distance.
3.5 Measurement of Monocular Pupillary Distance (as shown in Fig. 9a and 9b)
3.5.1
Start-up. The initialized setting of the device is just the binocular pupillary distance
for measuring
∞
optic distance.
3.5.2
Press Measuring State Transition Key (BIN) to choose mode of measurement,
and it will indicate on the lower right corner of the display window. When L is
shown, it means only left pupillary distance will be measured, and R for measuring
right pupillary distance.
3.5.3
Put the nose bearer lightly on the testee’s nose bridge and keep the instrument
in a horizontal state.
3.5.4
Let the testee to stare at the Staring Target of the device.
3.5.5
The tester observes the reflecting bright dot on the testee’s pupil through measuring
window. Press the Left or Right Pupil Measuring Key, the left or right pupillary
distance pointer will coincide the reflecting bright dot of the testee’s left or right
pupil, respectively. The datum shown in the display window is just the measured
pupillary distance.
Fig.9a (It is the state of the display window
when right eye pupillary distance is measured)
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