BEZOLD - BRUCKE EFFECT The signals of colour are sent to the human brain from three sets of receptors in the retina called cones, which are especially sensitive to red , blue and green. At low light levels, the rods in the retina of the human eye are more dominant than the cones , and colour perception is lost . As the brightness becomes more intense, colour appears to change. This change in colour/ hue due to change in brightness or light intensity is known as BEZOLD - BRUCKE EFFECT . This content is from dental pulse. So for more information please read dental pulse. THANKING YOU, DR. ASWINI JOSE (INTERN)