Research overview: spectral sensitivity of feline cone photopigments

The spectral sensitivity of a cone, the wavelength at which it absorbs light most strongly, determines its contribution to color vision. This survey reviews measurements of feline cone photopigment peaks obtained through methods such as microspectrophotometry and electroretinography. The data point to one cone tuned to short, bluish wavelengths and another tuned to middle-to-long, greenish-yellow wavelengths, consistent with dichromatic color vision. The overview compares these peaks with those of other mammals and discusses the technical difficulty of measuring sparse cones embedded in a rod-dominated retina. Understanding cone spectral tuning is the physiological foundation for predicting which colors a cat can or cannot distinguish, and it links molecular pigment properties to the blue-yellow discriminations observed behaviorally. The work also positions the cat within the wider story of how mammalian color vision was reduced during a nocturnal evolutionary bottleneck.