Well my eyes change color in the same lighting within minutes sometimes or even longer, what causes this?

Question

this happens in the same room, without additional background lighting (like from outside).

Answer 1

i do not understand this

Answer 2

well your eyes must be pretty, i do not know exactly, but i get this interesting article..

so according to Larry bickford, 2004:

Eye color is determined primarily by the concentration and distribution of melanin pigment on the iris fibers. The iris is located inside the eye, between the cornea (front most surface) and the internal crystalline lens. Although the majority of irises have similar pigment density on the back surface (called the iris pigment epithelium), some people have less and that allows for some reflection from the retina in the back of the eye. The retina reflects red from the network of blood vessels contained within its structure.

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.

hope this helps..