Fovea centralis

Fovea centralis
Schematic diagram of the human eye, with the fovea at the bottom. It shows a horizontal section through the right eye.
Details
Identifiers
Latin	fovea centralis
MeSH	D005584
TA98	A15.2.04.022
TA2	6785
FMA	58658
Anatomical terminology [edit on Wikidata]

The fovea centralis is a small, central pit composed of closely packed cones in the eye. It is located in the center of the macula lutea of the retina.^[1][2]

The fovea is responsible for sharp central vision (also called foveal vision), which is necessary in humans for activities for which visual detail is of primary importance, such as reading and driving. The fovea is surrounded by the parafovea belt and the perifovea outer region.^[2]

The parafovea is the intermediate belt, where the ganglion cell layer is composed of more than five layers of cells, as well as the highest density of cones; the perifovea is the outermost region where the ganglion cell layer contains two to four layers of cells, and is where visual acuity is below the optimum. The perifovea contains an even more diminished density of cones, having 12 per 100 micrometres versus 50 per 100 micrometres in the most central fovea. That, in turn, is surrounded by a larger peripheral area, which delivers highly compressed information of low resolution following the pattern of compression in foveated imaging.^{[citation needed]}

Approximately half the nerve fibers in the optic nerve carry information from the fovea, while the remaining half carry information from the rest of the retina. The parafovea extends to a radius of 1.25 mm from the central fovea, and the perifovea is found at a 2.75 mm radius from the fovea centralis.^[3]

The term fovea comes from Latin fovea 'pit'.

The fovea centralis was named by German histologist Carl Bergmann.^[4]