Inflammation of the iris is called iritis (the iris is the part of the eye that determines the color of the eye), and sometimes the ciliary body, which is behind the iris, can become inflamed along with it. When the iris is inflamed, tiny white cells from the inflamed area and excess protein leaking from the small blood vessels in the eye float in the atrial fluid between the iris and the cornea. If there are too many cells floating in the atrial fluid, they attack the back of the cornea and also settle in the atrial fluid. The cause of iritis is unknown. One or both eyes can be affected. So, how do you make a differential diagnosis of iris inflammation? The following is the differential diagnosis of iris inflammation: 1. Acute conjunctivitis Presenting with acute onset, foreign body sensation, burning sensation, secretion without much, eyelid swelling and conjunctival congestion are seen on examination, and these manifestations are distinctly different from acute anterior staphylitis in terms of photophobia, lachrymation, blurred vision, ciliary congestion, and anterior chamber reaction. 2.Acute angle-closure glaucoma Acute onset, sudden loss of vision, headache, nausea, vomiting, corneal epithelial edema, shallow anterior chamber, anterior chamber flashing, etc., but no anterior chamber inflammatory cells, the pupil is oval scattered large, increased intraocular pressure, and acute anterior uveitis with corneal hyaluronidation, a large number of KP, the depth of the anterior chamber is normal, a large number of inflammatory cells of the atrial aqueous humor, pupil narrowing, ocular pressure sign is normal or low and so on, easy to differentiate. Some primary intraocular tumors or intraocular metastases of tumors can cause atrial pus and other changes, but the two can be distinguished from each other by medical history, clinical examination of systemic lesions, X-ray, ultrasound, CT and other magnetic resonance examinations. 4, and can cause anterior uveitis can cause total uveitis differentiation Some types of uveitis, such as Behcet’s disease uveitis, Vogt-Koyanagi Harada disease, etc. can be manifested as total uveitis, so in the diagnosis should pay attention to the differentiation.