long-wavelength pigment

the photopigment, present in one of the three populations of retinal cones, that has maximum sensitivity to a light wavelength of 558 nm. The absence of the gene for the long-wavelength pigment causes protanopia (red color blindness). See also medium-wavelength pigment; short-wavelength pigment.

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January 19th 2025

short-wavelength pigment

short-wavelength pigment

the photopigment present in one of the three populations of retinal cones that has maximum sensitivity to a wavelength of 419 nm. The absence of the gene for the short-wavelength pigment causes tritanopia, a form of color blindness in which blue and green are confused with one another. See also long-wavelength pigment; medium-wavelength pigment.