02/01/2026
Iris cyst —
1. An iris cyst is a benign fluid-filled lesion arising from the iris pigment epithelium or stroma.
2. It may be primary (congenital/acquired) or secondary (trauma, surgery, drugs).
3. Usually asymptomatic and detected incidentally on slit-lamp examination.
4. Large cysts can cause pupil distortion, secondary glaucoma, or visual symptoms.
5. Management is observation, with treatment (laser/surgery) only if complicated.