PRECAUTION!
Do not cover the eye recognition transmitters or sensor during the measurement, for example
with ngers. Keep your hand, hair etc. and objects such as pillows away from the temple side
of your eye, as they produce an infrared reection that causes an error.
The tonometer includes an automatic eye recognition system that identies which
eye, right or left, you are measuring. The system has two infrared LED transmitters
just below the probe base and one infrared LED sensor above the probe base, as
in the gure below. The right-hand transmitter sends invisible infrared light to the
right and the left-hand transmitter to the left. The infrared light reects from your
nose to the sensor. The sensor knows from which transmitter the reected infrared
light came, and thus which eye you are measuring. The resulting eye indication is
included in the data that you can transfer to a PC, as described in the section 9.
Eye recognition system components.
1. Left and right infrared transmitter.
2. Infrared sensor.
EYE RECOGNITION COMPONENTS
2.
1. 1.
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