They use to look similar in color as the person in this pic:
When I shined a light into my eyes they would have a dark brownish-redish look. Now it looks like this (my own eye): http://img.photobucket.com/albums/v2...423cropped.jpg
...Yes I'm aware that the white balance is different between the two photos, but I feel it's close enough to give an accurate idea of what the difference in iris color is like. I've got 2 or 3 older pics of my eye close-up from a few years ago, taken with my DSLR (tried making an HDR of my eye lol). But they're not accessible atm. When I'm able to access those old photos, I'll get a new pic using the same camera on the same exposure settings, to get a more accurate comparison.
If you look close it almost seems like there's portions turning green or grey. These color variations aren't noticeable in indoor lighting. I don't know if it's visible outdoors (can't see myself & don't have a small mirror). As far as I know it's only visible when a flashlight is shined into my eyes. I don't think it's refractions or caustics, because nothing changes when I move the flashlight to any angle or distance; and my left eye has noticeably more color variation than my right eye (my right eye looks slightly closer to the original brown that I remember).
Should I get this checked out?