Oct 23, 2024 · An iris coloboma can cause a “keyhole” or “cat-eye” appearance. Because part of the iris is missing, it looks like the pupil extends into the colored area of the eye. Iris coloboma …

Ocular coloboma is relatively uncommon, affecting less than one in every 10,000 births. The classical description in medical literature is of a keyhole -shaped defect. A coloboma can occur …

Dec 27, 2022 · Colobomas are present in a person’s eye when they’re born. They can affect one or both eyes. The most common colobomas develop in your iris and cause your pupil to have …

Sep 10, 2024 · In this coloboma, part of the retina is missing. The symptoms of a coloboma depend on where it occurs. A coloboma of the iris will be visibly noticeable due to the keyhole …

Dec 6, 2024 · For example, iris coloboma can make the pupil (the round opening at the center of the iris) look more like a keyhole or teardrop. What causes coloboma? Coloboma happens …

Sep 12, 2024 · The most obvious symptom of a coloboma is a keyhole-shaped pupil common in uveal colobomas. Other symptoms of colobomas can include: Low or poor vision; Blindness or …

Mar 23, 2025 · A coloboma is a rare genetic abnormality that causes holes or gaps in the iris, retina, choroid, and other structures of the eye. Symptoms may include a keyhole or cat-eye …

A 13-year-old girl was referred to our clinic for evaluation of a “keyhole” abnormality of her left eye. The patient's medical and ocular history was unremarkable. Ocular examination revealed …

Mar 25, 2014 · In an infant, Coloboma is usually apparent because the pupil is irregularly shaped, often appearing as a “cat eye” or “keyhole” shape. A complete medical history and physical …

Coloboma can affect your iris, the tissue that gives you your eye colour. Your pupil may look oval if the coloboma is partial, but if more of your lower iris is missing, your pupil will look more …