dark adaptation
noun
: 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
Examples of dark adaptation in a Sentence
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Avoid using your phone, as even a glance at the screen can ruin your eyes’ dark adaptation.
—
Vahe Peroomian, The Conversation, 5 July 2023
Avoid using your phone, as even a glance at the screen can ruin your eyes' dark adaptation.
—Vahe Peroomian, CBS News, 5 July 2023
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Vahe Peroomian, The Conversation, 5 July 2023
Avoid using your phone, as even a glance at the screen can ruin your eyes' dark adaptation.
—Vahe Peroomian, CBS News, 5 July 2023
Cite this Entry
“Dark adaptation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/dark%20adaptation. Accessed 18 Jul. 2025.
Copy CitationMedical Definition
dark adaptation
noun
: 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
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