Constriction of the pupil when light is flashed into the eye.
An inherent reflexive action where the eye’s pupil instinctively reacts to the level of incoming light. Typically, the pupil contracts when exposed to intense light, regulating the quantity of light entering the eye. Conversely, in dim light, the pupil expands or dilates. An unusual light reflex might indicate an underlying eye or brain ailment.
A luminous cone observed on a healthy, typical eardrum.
The round patch of light reflected from the retina when examining the eye with retinoscopic instruments; also, the narrowing of the pupil in response to light.