the cones of the eye are located in the optic nerve.
where are the cones of the eye located?
optic nerve
cone cells, or cones, are photoreceptor cells in the retinas of vertebrate eyes (e.g. the human eye). they respond differently to light of different wavelengths, and are thus responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light. cone cells are densely packed in the fovea centralis, a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina. there are about six to seven million cones in a human eye and are most concentrated towards the macula.
cone cell
the ability of the [[human eye]] to distinguish colors is based upon the varying sensitivity of different cells in the [[retina]] to light of different [[wavelengths]]. humans are [[trichromacy|trichromatic]]—the retina contains three types of color receptor cells, or [[cone cell|cones]]. one type, relatively distinct from the other two, is most responsive to light that is perceived as blue or blue-violet, with wavelengths around 450 [[nanometre|nm]]; cones of this type are sometimes called "short-wavelength cones", "s cones", or "blue cones". the other two types are closely related genetically and chemically: "middle-wavelength cones", "m cones", or "green cones" are most sensitive to light perceived as green, with wavelengths around 540 nm, while the "long-wavelength cones", "l cones", or "red cones", are most sensitive to light is perceived as greenish yellow, with wavelengths around 570  nm.
color