Experimental setup to measure eyelid transmittance (IMAGE)
Caption
An Osaka Metropolitan University scientist conducted experiments on 33 participants under relatively bright conditions (illuminance of 100 lux) in which each participant’s entire face was illuminated. A lighting device was used to increase or decrease facial illuminance, and closed-eye light transmittance was measured by having the participants make adjustments to match the levels of brightness they perceived with their eyes closed and with their eyes open.
Credit
Hideki Sakai, Osaka Metropolitan University
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