9
F6. Nose Bearer
The testee's bridge rests on the nose bearer so that the position of the
testee's pupils is
fi
ed.
F7. Observation Window
Two windows provided for a testee to stare at the target with his (her)
eyes.
F8. Forehead bearer
The testee's forehead rests on the forehead bearer so that the position
of his pupils is
fi
ed.
F9 ON/Off KEY
Press this key once to turn on the device, and press it again to turn
off.
F10. Right Pupil Measuring Key
It is used to measure right pupillary distance. Sliding the key to the
outer side will make pupillary distance pointer move in opposite
direction of the nose bearer. At this time, the right eye pupillary
distance and binocular pupillary distance increase in numerical value.
Sliding the key to the inner side will make the pupillary distance
pointer move towards the direction of the nose bearer. Now
numerical value of the pupillary distance decreases.
Nose Bearer, and Forehead bearer constitute a Type B applied part.