dark adaptation

the ability of the eye to adjust to conditions of low illumination by means of an increased sensitivity to light. The bulk of the process takes 30 minutes and involves expansion of the pupils and retinal alterations, specifically the regeneration of rhodopsin and iodopsin. See also rod–cone break. Compare light adaptation.

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Psychology term of the day

May 6th 2024

risk–rescue rating

a formula comparing the inherent risk of a method of attempted suicide with the likelihood of discovery and rescue.