Retinal correspondence is the inherent relationship between paired retina

Retina

The vertebrate retina is a light-sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical...

l visual cells in the two eye

Human eye

The human eye is an organ which reacts to light for several purposes. As a conscious sense organ, the eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth...

s. Images from one object stimulate both cells, which transmit the information to the brain

Human brain

The human brain has the same general structure as the brains of other mammals, but is over three times larger than the brain of a typical mammal with an equivalent body size. Estimates for the number of neurons in the human brain range from 80 to 120 billion...

, permitting a single visual impression localized in the same direction in space.

Types

Normal retinal correspondence (NRC) is a binocular condition in which both fovea

Fovea

The fovea centralis, also generally known as the fovea , is a part of the eye, located in the center of the macula region of the retina....

s work together as corresponding retinal ponts, with resultant images fused in the occipital cortex

Visual cortex

The visual cortex of the brain is the part of the cerebral cortex responsible for processing visual information. It is located in the occipital lobe, in the back of the brain....

 of the brain.

Abnormal retinal correspondence (ARC) is binocular sensory adaptation to compensate for a long-standing eye deviation (i.e. strabismus

Strabismus

Strabismus is a condition in which the eyes are not properly aligned with each other. It typically involves a lack of coordination between the extraocular muscles, which prevents bringing the gaze of each eye to the same point in space and preventing proper binocular vision, which may adversely...

. The fovea of the straight (non-deviated) eye and non-foveal retinal point of the deviated eye work together, sometimes permitting single binocular vision.

External links

• Bhola, Rahul. Binocular Vision. University of Iowa Department of Ophthalmology & Visual Sciences: EyeRounds.org. January 23, 2006.
• International Orthoptics Association
• Orthoptics Association of Australia