Adjustment of the eye to low levels of illumination, which results in increased sensitivity to light.

the eyes' transition to night vision, in order to see faint objects. Dark adaptation is rapid during the first 5 or 10 minutes after you leave a well-lit room, but full adaptation requires at least a half hour, and can be ruined by a momentary glance at a bright light.

The physical and chemical adjustments of the eye and visual system that make vision possible in low levels of illumination by increasing its sensitivity to light.

Adaptation to decreasing levels of ambient illumination by an increase in receptor sensitivity

The ability of the eyes to adjust to reduced illumination.

the process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours

the adjustment of the retina and iris (pupil) to decreased illumination

the process by which the human eye becomes well adjusted to seeing dim objects in the dark.

The adjustment of the eyes that occurs over time when one enters a darkened area. This adjustment permits the eye to see better in the dim lighting conditions.

Changes in your eyes that allow you to see well in the dark. It takes about 20 minutes for your eyes to completely adapt to darkness.

The process by which the retina becomes adapted to a luminance of less than 0.01 footlamberts.

Ability of the eye to adjust itself to a low level of illumination.