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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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Psychology term of the day

November 17th 2024

soft key

soft key

in ergonomics, a control key that activates multiple functions depending upon the state of the system. Soft keys are usually mapped to a specific area on the display.