There are various causes of iritis, and the prognosis varies depending on the etiology. Some causes of iritis, such as local infection and lens lysis, can be cured by removing the cause, for example, iritis due to bacterial infection, with topical (eye drops or subconjunctival injection) or systemic (oral or intravenous drip) application of antibiotics to control the infection. Iriditis due to lens lysis is completely cured by cataract surgery to remove the lens. However, some causes of iritis, such as those caused by autoimmune diseases, require long-term medication to control recurrence. For example, oral hormones, topical drops of 0.5% cortisone or 0.05% dexamethasone, or subconjunctival injections of tretinoin. In addition, non-steroidal anti-inflammatory agents, such as pralophine drops, and ciliary muscle paralyzing agents, are added to prevent post-iris adhesions. For severe iritis, immunosuppressants or immune enhancers may be considered for immunotherapy when the use of hormones is ineffective. In addition, hot compresses or short wave therapy to dilate blood vessels, promote blood circulation, and enhance inflammatory absorption. In case of complications, symptomatic treatment is needed, for example, IOP-lowering drugs can be used to bring down the IOP for secondary glaucoma; cataract extraction can be performed under inflammation control for complications of cataract. Therefore, depending on the cause, some iritis can be completely cured, while others require long-term medication to prevent recurrence.