Photoreceptor

Definition

Photoreceptors are specialized neurons located in the retina of the eye that convert light into electrical signals, facilitating vision. These cells play a crucial role in sensory perception by allowing the brain to interpret visual information.

Related terms

Retina:

The layer at the back of the eyeball containing cells that are sensitive to light and trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

Rods:

A type of photoreceptor in the retina that is highly sensitive to light, making them responsible for vision at low light levels.

Cones:

A type of photoreceptor in the retina that functions best in bright light and enables high-acuity color vision