d. Preparation of examinee
1. Clean the chinrest and dispose one chinrest liner on the top.
Clean the chinrest with the neutral cleanser when there is no chinrest liner.
For disinfecting the chinrest, use the ethanol.
• Ethanol for disinfection contains 76.9 to 81.4vol% of ethanol (C
2
H
6
O) at 15°C (specific
gravity).
2. Ask the examinee to put his/her chin on the chinrest. Adjust the height of the chinrest so that the
examinee's eye level is in line with the eye mark.
3. Uncomfortable posture may fatigue the examinee during the measurement. Adjust the chinrest or the
device to avoid it.
4. It affects its measurement accuracy if the examinee moves his/her head during the measurement. Ask
him/her to fix his/her forehead on the headrest and look at the target with a good posture.
5. Talk to the examinee fluently and try not to make him/her nervous.
Uncomfortable posture may fatigue the examinee during the measurement. Adjust the height of
the optical table or the chair to avoid it.
e. Alignment
There are 3 types of startup procedures (Auto Quick, Auto and Manual) for AKR550.
It can be switched in start of the setup screen.
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