An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) The act or process of adapting.
2) The state of being adapted.

→ adapt.

Physiological process whereby the eye adjusts its sensitivity for different levels of illumination.

→ adaptation, → eye.

The automatic adjustment of the iris and retina of the eye to allow maximum vision in the dark, following exposure of the eye to a relatively brighter illumination.

→ dark; → adaptation.

The reflex adaptation of the eye to bright light, consisting of an increase in the number of functioning cones, accompanied by a decrease in the number of functioning rods; opposed to dark adaptation.

→ light; → adaptation.