Dark-adapted vision occurring in dim or low light by employing the retinal rod system. Scene lacks saturation and appears as shades of gray due to lack of color differentiation. When the illumination wavelength of any target reaches 510 nm, that object will seem brighter with relation to other targets having the same energy, as this is the optimal sensitivity wavelength in the rod system. Also known as: twilight vision. Compare with: photopic vision.

SCOTOPIC VISION: "Scotopic vision can help humans see in relatively low-light situations."
Cite this page: N., Pam M.S., "SCOTOPIC VISION," in, April 28, 2013, (accessed September 28, 2021).