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An iris coloboma is a notch or gap in the iris that forms when fetal eye structures do not close completely. The opening can be small or extend toward deeper eye tissues. People may notice a keyhole-shaped pupil and increased light sensitivity. Vision is often normal unless other structures are involved. Exams check whether the coloboma affects nearby tissues.
read more about iris coloboma ...Most cases are present from birth due to incomplete closure of the fetal fissure. Genetic factors may contribute. Colobomas can occur alone or alongside other ocular abnormalities. Rarely, trauma or surgery can cause a coloboma-like defect. Identifying involvement beyond the iris guides monitoring.
Light sensitivity is common due to the enlarged pupil opening. Glare may increase in bright environments. Some people notice slight distortion in image focus. Cosmetic appearance may draw attention, though function often stays stable. Vision changes depend on associated structural defects.
Slit lamp exam shows the shape, size, and depth of the defect. Doctors evaluate whether the lens, retina, or optic nerve are also affected. Imaging may be used for deeper structures. Family history sometimes provides clues. Diagnosis helps guide long-term monitoring.
Tinted lenses reduce glare and light sensitivity. Cosmetic contact lenses can mask the defect. Surgery is rarely done but may improve pupil shape in select cases. Follow-up checks ensure no secondary issues develop. Most cases remain stable across life.
Often only through increased glare.
Yes. Some cases have genetic links.
No. The defect is usually stable.
Seek care if glare or sensitivity increases.