Which number do you see in the far left? If it’s “3,” you probably have normal color vision. If it’s a “5,” you may be colorblind. This view is simulated in the center panel and represents a mild color vision deficiency. About 10% of men are born colorblind, but few women. Complete color blindness (very rare) is simulated at right. No number is visible. Tinted glasses may help the colorblind see better.