Is the presence of a dark ring around the iris of the eye considered normal?

The presence of a dark ring around the iris of the eye can be considered normal in certain cases. There are two conditions related to dark rings around the iris: limbal rings and corneal arcus. Let's explore each of them in detail:

1. Limbal Rings:

   • Limbal rings are dark circles that surround the iris, the colored part of the eye.
   • Almost everyone is born with limbal rings, but they tend to fade or become less visible as a person ages [1].
   • Some people find limbal rings attractive in a partner [1].
   • The presence or absence of limbal rings does not indicate any health condition and is not a cause for concern [1].

2. Corneal Arcus:

   • Corneal arcus is a condition characterized by a gray, white, or bluish circle around all or part of the iris [3].
   • It is more commonly seen in older adults and is associated with aging [3].
   • Corneal arcus is generally considered benign and does not affect vision or harm the eye [3].
   • In younger individuals, corneal arcus may be associated with a higher risk of cardiovascular disease, especially in those with familial hypercholesterolemia [3].
   • If corneal arcus appears only in one eye or in individuals under 50 years old, it may indicate an underlying condition that requires further evaluation and treatment [3].

Learn more:

1. Limbal Rings: What They Are and Who Has Them - Healthline
2. People Whose Eyes Have A Dark Ring Around The Iris Appear More Attractive, Study Says
3. Corneal Arcus: What the Ring Around Your Cornea Means