dark adaptation(redirected from Adaptation (eye))
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The physical and chemical adjustments of the eye, including dilation of the pupil and increased activity of rods in the retina, that make vision possible in relative darkness.
dark′-a·dapt′ed (-ə-dăp′tĭd) adj.
the reflex adjustment of the eye to dim light or darkness, consisting of a dilation of the pupil, an increase in the number of functioning rods, and a decrease in the number of functioning cones.