- A limbal ring is a dark ring around the iris.
- Most of us are born with limbal rings but they tend to thin out with age; the younger you are, the more prominent your limbal rings are likely to be.
- Some people naturally have more defined rings that last well into adulthood while for others, the rings are barely perceptible.
- In general, limbal rings begin to decline in one’s 20s, disappearing altogether in old age.
- Limbal rings are more prominent in people with lighter colored eyes, subtly enhance the eyes, and make the whites of the eyes appear whiter.
In this famous 1985 National Geographic photo entitled Afghan Girl, the girl, Sharbat Gula, has not only prominent limbal rings, but also has green eyes. It’s estimated that only 2% of the world’s population has green eyes. Sharbat Gula was 13 when the photo was taken.