darkadaptation

dark adaptation n.

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.

  darkʹ-a·dapt' (därkʹə-dăpt') v. dark'-a·daptʹed (därk'ə-dăpʹtĭd) adj.

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