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An iris cyst is a fluid-filled sac that develops within or behind the iris. These cysts may be primary, forming from iris tissue, or secondary, appearing after trauma or surgery. Most are harmless and produce no symptoms. Larger cysts may distort the pupil or narrow the angle. Exams help determine whether the cyst is stable or growing.
read more about iris cyst ...Primary cysts arise from pigment epithelium or stromal tissue. Trauma can trap tissue and form a secondary cyst. Prior surgery or inflammation may also contribute. Certain medications are linked to cyst development. Identifying the cause helps predict behavior.
Small cysts cause no symptoms. Larger ones may change the pupil's shape or cause glare. Angle narrowing can increase pressure. People may notice a dark, rounded spot on the iris. Symptoms depend on size and location.
Slit lamp exam reveals their shape and placement. Ultrasound biomicroscopy shows depth and internal structure. Pressure testing helps detect angle involvement. Doctors compare images over time to track growth. Diagnosis guides whether treatment is needed.
Observation is common when cysts remain stable. Laser treatment can collapse selected cysts. Surgery is reserved for large or angle-blocking cysts. Medication may help with associated pressure changes. Regular monitoring follows any intervention.
Most are harmless and stable.
Some do, which is why monitoring matters.
Not usually unless pressure rises.
Seek care if the pupil shape changes or pressure increases.