# 17-22-016

photopic vision

vision by the normal eye in which cones are the principal active photoreceptors

Note 1 to entry: Photopic vision normally occurs when the eye is adapted to levels of luminance of at least 5 cd·m−2.

Note 2 to entry: Colour perception is typical of photopic vision.

Note 3 to entry: This entry was numbered 845-02-09 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-938 in CIE S 017:2011.

Publication date: 2020-12