the cones in the retina are sensitive to color.
the cones in the retina are sensitive to color.
what are the cones in the retina sensitive to?
color
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
retinal eccentricity is when objects projected directly onto the fovea are the sharpest, while those further out in the periphery of the retina become steadily less focused. this is due to the distribution of cones and rods throughout the retina. when we view an image, light passes through the cornea, and through the pupil, which is controlled by the iris. it then passes through the lens and is projected onto the retina at the back of the eye. in the middle of the retina is the fovea, which contains a high concentration of cones. cones are responsible for colour vision and have high spatial acuity, whereas rods are not. rods are instead responsible for vision at lower light. cones are much more sparsely located in the periphery of the retina, where there is instead a greater concentration of rods. when a central image is projected directly onto the fovea it is sharper and processed with greater speed and accuracy due to these cones, whereas images further in the periphery (greater eccentricity) are processed more slowly and less accurately.
eccentricity effect