Question: What is color blindness ?
Ans. Colour blindness is a defect of vision in which a person can not distinguish between colours . There is no actual blindness but there is a deficiency of color vision . A person with color-blindness has trouble seeing red, green, blue, or mixtures of these colors. The most common type is red-green color-blindness, where red and green are seen as the same color.This is due to damage to or insensitivity of one , two or all the three sets of nerves which are sensitive to the primary colors , namely , red green and blue.