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Adaptation ocular

Ocular adaptation, in the visual physiology, is the adjustment of the eye to variations in the intensity of light. In light adaptation, the eye adjusts when the light threshold is increased and the adjustment can occur within seconds. However, in dark adaptation, the eye adjusts longer when the light is greatly reduced. In humans, this could take for up to two hour period. The cone cells are responsible for vision at higher illumination levels whereas rod cells are responsible for the night vision.


  1. Holmes, R. (2016). “Seeing single photons”. Physics World. Retrieved from https://www.biologyonline.com/wp-content/uploads/attachments/PWDec16Holmes.pdf

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