Would a man wear strip res slacks and a blue plaid shirt and orange rubber shoes? She might if she had color blindness. Color blindness is the inability to identify two or more shade in the spectrum. There are two types of color blindness. Monochromats with total color blindness, their world looks like a black and white movie. The type of color blindness is rare and results from individuals with only rods or just a kind of cone function. Dichromats usually have a problem with distinguishing red from green because they have only two types of cones. It is an inherited condition, found mostly in males.

You might think that colorblind people will quickly discover that they have a problem. In fact, many do not know until quite late in life: they assume that others see the world exactly as they do. One two-color boy’s condition was first discovered when he told his mother that he was being chased home by a big green dog. If not for this, the boy could not have discovered he was colorblind until much later in life.