It looks really cool & beautiful. Many contact lenses nowadays have dark outline around the iris. SOme people are lucky to have it naturally
Picture of a person with dark rings around their iris:
No dark outline iris:
http://en.wikipedia.org/wiki/File:Brown_eyes.jpg
I noticed that some people have thicker dark rings and some have thin dark ring around the iris.
Iris with thick dark outline is rare.
Is it dominant or a recessive trait?
Most brown/black eyes people dont have the ring too.
>>> Why some people have dark rings around their iris and others dont have?