dark adaptation


noun Ophthalmology.

the reflex adaptation of the eye to dim light, consisting of a dilatation of the pupil and an increase in the number of functioning rods accompanied by a decrease in the number of functioning cones (opposed to light adaptation).

Origin of dark adaptation

First recorded in 1905–10

OTHER WORDS FROM dark adaptation

dark-a·dapt·ed, adjective

Words nearby dark adaptation

Medical definitions for dark adaptation

dark adaptation
[ därk ]

n.

The adjustment of the eye under reduced illumination, in which sensitivity to light is greatly increased. scotopic adaptation