Biology, 12.07.2019 19:30 tttyson

Human eye has a biological control system that varies the pupil diameter to maintain constant light intensity to the retina. as the light intensity increases, the optical nerve sends a signal to the brain, which commands internal eye muscles to decrease the pupil's eye diameter. when the light intensity decreases, the pupil

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Human eye has a biological control system that varies the pupil diameter to maintain constant light...