light adaptation n the adjustments including narrowing of the pupillary opening and decrease in rhodopsin by which the retina of the eye is made efficient as a visual receptor under conditions of strong illumination compare DARK ADAPTATION
light-adapt·ed 'līt-ə-.dap-təd adj
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reflex changes in the eye to enable vision either in normal light after being in darkness or in very bright light after being in normal light. The pupil contracts (see pupillary reflex) and the pigment in the rod is bleached. Compare dark adaptation.
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adaptation of the eye to vision in the sunlight or in bright illumination (photopia), with reduction in the concentration of the photosensitive pigments of the eye; called also photopic a.Medical dictionary. 2011.