The<unk>  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. The<unk>  is responsible for sharp central vision (also called<unk> l vision), which is necessary in humans for activities for which visual detail is of primary importance, such as reading and driving. The<unk>  is surrounded by the parafovea belt and the perifovea outer region. 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<unk> . That, in turn, is surrounded by a larger peripheral area, which delivers highly compressed information of low resolution following the pattern of compression in<unk> ted imaging. Approximately half the nerve fibers in the optic nerve carry information from the<unk> , 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<unk> , and the perifovea is found at a 2.75 mm radius from the<unk> . The term<unk>  comes from the .
Fovea centralis
Caput Medusae
Corpora quadrigemina
Caput medusae
Vesical tenesmus
Cutis verticis gyrata
Pterygium inversum unguis
Glia limitans