changing colors?

Question

How do peoples eyes change colors and I want to know because it has always facinated me how they change color(I have a few friends that their eyes can change color too).

Answer 1

Eye color is about reflection of ambient light from the structure of the iris. People with lightly colored irises note that their eye color changes according to the colors they wear. No mystery there, but the resultant apparent color of the eye is a combination of the color reflected from one's clothing (or even eye make up) and is not always what you might expect!

Some people have noted that when they are ill or under stress that their eye color becomes darker or lighter. Clearly there has been a change in the distribution and/or density of melanin or lipofuscin on the iris. How this actually occurs is not fully understood, but we are beginning to have some clues as to the processes. A recent medication used to treat glaucoma, latanoprost, causes such a color change. We understand, at least partially, the mechanism of action of the drug, a prostaglandin analog, which means it mimics this hormone, which is normally present in the body. It would appear, then that hormones may have effect iris pigmentation and this might explain the change in eye color sometimes seen in adults. It should be mentioned that there are certain specific systemic and eye diseases that can cause a change in iris color and any marked change of short period of time requires prompt medical attention.

Answer 2

I think the color of the eyes depends on what they are wearing. It's kind of like how somtimes black can look navy blue in a certain light.