Why Do Some People Have Dark Rings Around the Iris of Their Eye? - Bellatory
Iris of an eye in close-up - a Royalty Free Stock Photo from Photocase
What Your Eyes Can Tell You About Your Health - Eye Problems
Iridology
corneal arcus hyperlipidaemia Stock Photo - Alamy
Quite Interesting on Twitter: "The limbal ring is the dark circle around your iris. Research has shown that, when considering a short-term fling, heterosexual women are more attracted to men with a
A whitish ring all around the iris, of roughly equal width, resembles... | Download Scientific Diagram
What is the cause of a brown ring around the pupil? - Quora
12 scary things your eyes say about your health
Corneal Arcus: What the Ring Around Your Cornea Means