MEDICAL PHYSIOLOGY

Detailed explanation-1: -When light hits the retina (a light-sensitive layer of tissue at the back of the eye), special cells called photoreceptors turn the light into electrical signals. These electrical signals travel from the retina through the optic nerve to the brain. Then the brain turns the signals into the images you see.

Detailed explanation-2: -In a properly functioning system, each eye has corresponding optic nerves, little cables of nerve fibers made up of a collection of neuronal axons, which are the points of connection between the retina and the brain. The retina uses those optic nerves to send signals to the brain.