Iritis is usually not self-healing. Patients need to be treated promptly with medications such as dilators and glucocorticoids, and have their eyes reviewed regularly. 1. Causes: Iritis is caused by exogenous infection (such as bacterial infection caused by penetrating eyeball injury or corneal ulcer), endogenous infection (such as allergic reaction, etc.), or spreading by inflammation of adjacent tissues such as cornea, sclera, retina or vitreous. 2. Symptoms: Redness of the eye, eye pain, tearing, loss of vision. If left untreated, acute glaucoma may occur, and long-term iritis may lead to complications such as cataract. 3.Treatment: (1) Pupil dilators: commonly used dilators include atropine, homatropine, tropicamide and so on. The application of such drugs can play a certain role in relieving the spasm of the pupillary sphincter and ciliary muscle, and can reduce the compression of the ciliary muscle on the ciliary blood vessels, improve local blood circulation; reduce vascular permeability, reduce exudate; make the pupil open up, and prevent the posterior iris from adhering. (2) Glucocorticoid eye drops: mainly used for anterior uveitis and anterior chamber with inflammation, the drugs include hydrocortisone, dexamethasone and so on. It can play a certain role in reducing capillary permeability, inhibiting inflammatory cell infiltration and exudation, inhibiting fibroblast proliferation, reducing collagen fiber degeneration and intercellular proliferation. Patients with iritis need to seek medical treatment as soon as possible. Drugs need to be applied under the guidance of a doctor, and patients need to pay attention to reasonable and hygienic eye use in the course of treatment to promote the recovery of the disease.