Humans have different eye color

[Straha]

Lets say that humanity in its evolution somewhere along the line developed a different strucutre for its eyes. Basically eyes thast are like the attached image. Basically they'd be like this kind of eye but with a wider range of colors. In this world humanity would have a much more diverse range of eye color than OTL. Instead of OTL's situation where 1/5 of the planet has light eyes with the other 4/5 having brown/black eyes we'd see MANY different eye colros in locations. Basically blue eyed people all over the world and not just in scandanavia.

[Tom Veil]

It depends on whether eye color is controlled by genetics, or by environment (for instance, you eat certain foods, your body turns the pigments into eye coloring). If it's genetics, then there's no difference except for the giant butterflies. If it's environment, then that could have some very sharp effects on how group identity and its ugly cousin racism work.

[Straha]

Its genetics. Basiclaly instead of only having euros and their descendents being the ones who deviate form the pattern od fasrker eye color we see dark eyes being rare and more colors popping up. Also this adds in more colors like yellow/pink/purple/red to the mix.

[Archangel Michael]

That's a pretty cool pic, Straha. Where'd you find it?

Certain eye colors might be atributed to certain races. Again, racism would be involved.

[The Ubbergeek]

Look like a photoshop-edited pic of a Naruto fangirl. :)

[Leej]

Its genetics. Basiclaly instead of only having euros and their descendents being the ones who deviate form the pattern od fasrker eye color we see dark eyes being rare and more colors popping up. Also this adds in more colors like yellow/pink/purple/red to the mix.

You can get yellow eyes, its rare but it happens.
My eyes are purplish, thats not that rare.
Also its not just scandinavians with blue eyes- that trait comes from other groups of Europeans to (and no not just because of Scandinavian influence). It also happens in other non-European groups sometimes.

http://en.wikipedia.org/wiki/Eye_colour

[eschaton]

As I understand it, light eyes are at least slightly more sensitive to sunlight, so I think there'd be enough of a disadvantage in equatorial environments to have dark brown/black eyes stay the norm there regardless.

Purple and Amber are real possibilities, since they already exist in very small amounts, but to the best of my knowledge there are no red irises among any mammal populations, meaning we can't even have recessive genes for them.

[Straha]

eschaton- Light eyes may be more sensitive to sunlight than darker eyes but in this ATL instead of brown/dark brown(that's what'scalled "Black" eyes) we'd have dark blue, dark green, dark purple, dark red, actual black and dark grey eyes around. Have red eyes pop up spontaneously. Nothing says eovlution has to always follow logical paths.
The Ubergeek- I found it posted on 4chan

[Leej]

As I understand it, light eyes are at least slightly more sensitive to sunlight, so I think there'd be enough of a disadvantage in equatorial environments to have dark brown/black eyes stay the norm there regardless.

Purple and Amber are real possibilities, since they already exist in very small amounts, but to the best of my knowledge there are no red irises among any mammal populations, meaning we can't even have recessive genes for them.
You probally just overlooked this but some mammels do have red eyes- albinos. They are pretty common amongst pet rabbits and the like.
But then those species have totally different kinds of eyes to humans (all black...) so I don't know if it'd be possible to have human albinos end up the same. I'm no....What do you call a eye studying scientist? Its not a optician...hmm...

[The Ubbergeek]

Ophtalmologist, friend. :)

[Straha]

I'm talking about red eyes for non-albinos and an actual red iris not a lack of pigment causing it to look red.

[eschaton]

You probally just overlooked this but some mammels do have red eyes- albinos. They are pretty common amongst pet rabbits and the like.
But then those species have totally different kinds of eyes to humans (all black...) so I don't know if it'd be possible to have human albinos end up the same. I'm no....What do you call a eye studying scientist? Its not a optician...hmm...

Actually, the red eyes of Albino rats and the like are caused by the pupil being red, not the Iris. Albino animals with larger eyes don't have red eyes under normal situations. Instead, you end up with pale blue eyes which, if the light hits them in the proper direction, can glow sort of reddish. As an example of this, look at Snowflake, the recently deceased albino gorilla.

http://www.pbs.org/wnet/nature/snowflake/photo_pop_yellow/images/1.jpg