RECENT measurements by Granit 1 on the electrical response of individual receptors in the retinæ, of various animals—frog, rat, cat, snake, etc.—have shown that the spectral sensitivity of the cones ...

While humans possess three kinds of color-sensitive cones, birds have four. This is an Inside Science story. Hummingbirds can see colors humans can only imagine, an ability that now sheds light on an ...

ABSTRACT: The spectral sensitivity of larval and juvenile stages of 3 species of coral reef fishes, Apogon compressus (Apogonidae), Pomacentrus amboinensis (Pomacentridae) and Premnas biaculeatus ...

Daylight photoreceptors and UV sensitivity in the retinas of nocturnal bats The eyes of nocturnal bats possess two spectral cone photoreceptor types for daylight and colour vision. Reporting in the ...

A new retinal stimulation technique called Oz enabled volunteers to see colours that lie beyond the natural range of human vision. Developed by researchers at UC Berkeley, Oz works by stimulating ...

Photometric measurements bias the radiant power at each wavelength with a luminosity function, which models human spectral sensitivity, to account for this variation. The photopic sensitivity function ...

Photometers or light meters are radiometers that include a filter and photodiode and responds based on the average human eye: the CIE 1924 luminosity function V λ. However, the light sensitive diode ...