Iridocyclitis is the most common form of uveitis and is prone to recurrence. The main clinical manifestations are ocular redness, ocular pain that may spread to the periorbital area, blurred vision, and mild vision loss in the early stages, followed by increased vision loss in the later stages if complications develop. Examination may reveal conjunctival congestion, cloudy atrial fluid and posterior corneal deposits, unclear iris texture, iris nodules and posterior iris adhesions, and plummeting pupil distortion. If not treated promptly, serious complications such as secondary glaucoma, concurrent cataracts, and ocular atrophy may occur and lead to blindness. It needs to be differentiated from conjunctivitis, glaucoma, keratitis and other diseases. The two main principles of treatment are: hormone and pupil dilatation.