JACOPIN / SCIENCE PHOTO LIBRARY JACOPIN / SCIENCE PHOTO LIBRARY
SIGHT Day and night vision: the retinal cones. Illustration of a cone, the retina's photoreceptor cell which makes both day (diurnal) and night (nocturnal) vision possible. Physiological description with close-ups of both types of vision. Above, nocturnal vision and below, diurnal vision.
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