Retina

DEFINITION

Anatomically essential to seeing, this is a delicate, multilayered, light-sensitive membrane lining the inner eyeball, opposite the eye's lens. It is a sheet of photoreceptors (light receptors), millions of specialized brain cells (neurons) which are excited by light. These light receptors are differentiated into neurons called rods and cones, which are connected by the optic nerve to the brain.The retina is much like a sheet of film inside an analog camera, but it has a hole in it known as a blind spot. At this location, neurons pass as a bundle through the photoreceptor sheet to form the optic nerve, which carries information from the eye to the rest of the brain. Here there are no photoreceptors, and hence the brain gets no information from the eye about this particular part of the picture of the world.(pr. RE-tə-nu)Related resources: A diagram of the human eye.Also see afterimage, binocular vision, colorblind, gestalt, night blindness or nyctalopia, Op Art, ophthalmology, optical, optical mixing, perception, peripheral vision, photography, pupil, refraction, retinal art, stereoscopic vision, and vitreous humor.

Your data and time are valuable. There's a new web browser that considers your time and security as a top priority.

Download Brave Browser For Free!

Brave uses the latest in blockchain technology.

This ensures a higher quality and more secure experience. Learn more about this fantastic breakthrough.

Loads Content Up To 8X Faster

Because Brave blocks unwanted tracking scripts that run in the background, your browsing speed will be unparalleled.

Ultimate in Privacy & Security

Brave fights malware and prevents tracking, keeping your information safe and secure.