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Figure 1 | Journal of Physiological Anthropology

Figure 1

From: Association between melanopsin gene polymorphism (I394T) and pupillary light reflex is dependent on light wavelength

Figure 1

Set-up for the experiments. A total of 225 modules of a 3-in-1 type (RGB) LED on a square panel (350 × 350 mm) were prepared, and the intensity of lights was controlled by analog voltage-width modulation. The diffuser, located in front of the light device, was 300 mm from subject’s eyes. Pupil diameter was measured in the left eye using an EMR-8 eye-tracking system with an infrared camera (Nac Image Technology, Inc., Japan).

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