The Archives of Ophthalmology, 122(7), 957-65 A 5-year, multicenter, open-label, safety study of adjunctive latanoprost therapy for glaucoma. You can learn more about how we ensure our content is accurate and current by reading our editorial policy. We link primary sources - including studies, scientific references, and statistics - within each article and also list them in the resources section at the bottom of our articles. Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. Sectoral heterochromia often resembles an irregular spot on the iris of the eye and does not form a ring around the pupil. In people with sectoral heterochromia, also known as partial heterochromia, one part of the iris is a different color from the rest. The cornea is usually clear and allows the color of your iris beneath it to show through. For example, they may have one blue eye and one brown eye. A true ring around the edge of the cornea is called arcus senilis, as seen in the image above. People with this condition have two different-colored eyes. Eyes that have this pattern may be referred to as “cat eyes.” The outer color is considered to be the true iris color in people with central heterochromia.Ĭentral heterochromia tends to occur in irises that have low levels of melanin. The inner ring often seems to have “spikes” of different colors that radiate from the pupil or the black circle at the center of the iris. Usually, the outer ring of the iris is one color while the inner ring is another. What we do know is that not everyone has one. Some preliminary research indicates that having a limbal ring may be caused by having a less transparent cornea, but that hasn’t been verified. The different types of heterochromia of the eye include: Central heterochromiaĬentral heterochromia is characterized by having two different colors in the same iris. Most commonly, you see brown, blue, or hazel eyes when you look at the people around you, but some people, whether it be luck or a medical condition. The ring is called a limbal ring and it’s a circular area of pigment around the iris of the eye.

Brown ring around pupil