eye color

[Floyd Waddle]

Anthony Tomlinson <tomlinson at pplros.demon.co.uk> writes

> Just to muddy the waters, my eyes are hazel, but vary in colour from
> green to
> brown at different times. This has nothing to do with lighting or
> anything like
> that; it seems to be a genuine phenomenon. Any ideas?

Not that I have the answer, but I am curious.  How quickly does the color 
change, from one minute to the next, one hour, one day, one week?  Does 
it have anything to do with mood, time of day, or time of year?