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dark adaptation

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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).
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Origin of dark adaptation

First recorded in 1905–10

OTHER WORDS FROM dark adaptation

dark-a·dapt·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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