n. a condition of maintaining perceptual constancy in viewing familiar objects. Thus, anything familiar to the eye (like a blank sheet of white paper) will appear to have the same brightness regardless of illumination. Also called lightness constancy. See color constancy- also object constancy.

BRIGHTNESS CONSTANCY: "Whether at dusk or at dawn, a white bedsheet would be visually perceived as having the same brightness constancy."
Cite this page: N., Pam M.S., "BRIGHTNESS CONSTANCY," in, April 7, 2013, (accessed October 18, 2021).