dark adaptation

noun
|Updated on: 11 Jun 2018

Definition of dark adaptation

: the process including dilation of the pupil, increase in sensitivity of the retinal rods, and regeneration of rhodopsin by which the eye adapts to conditions of reduced illumination

dark-adapted

play \ˌdärk-ə-ˈdap-təd\ adjective

Recent Examples of dark adaptation from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dark adaptation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of dark adaptation

1900

in the meaning defined above

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Medical Dictionary

dark adaptation

noun \ ˌdärk- \

medical Definition of dark adaptation

: the phenomena including dilation of the pupil, increase in retinal sensitivity, shift of the region of maximum luminosity toward the blue, and regeneration of rhodopsin by which the eye adapts to conditions of reduced illumination — compare light adaptation

dark-adapted

play \ˈdärk-ə-ˌdap-təd\ adjective

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