The most common antigens include HLA-B27, HLA-A29 (in birdshot chorioretinopathy) and HLA-B51 (in Behçet disease).Radiology X-ray may be used to show coexisting arthritis and chest X-ray may be helpful in sarcoidosis. Classification
Uveitis is classified anatomically into anterior, intermediate, posterior, and panuveitic forms—based on the part of the eye primarily affected. Prior to the twentieth century, uveitis was typically referred to in English as "ophthalmia." Anterior uveitis includes iridocyclitis and iritis. Iritis is the inflammation of the anterior chamber and iris. Iridocyclitis is inflammation of the iris and ciliary body with inflammation predominantly confined to ciliary body. Anywhere from two-thirds to 90% of uveitis cases are anterior in location (iritis). This condition can occur as a single episode and subside with proper treatment or may take on a recurrent or chronic nature. Intermediate uveitis, also known as pars planitis, consists of vitritis—which is inflammation of cells in the vitreous cavity, sometimes with snowbanking, or deposition of inflammatory material on the pars plana. There are also "snowballs," which are inflammatory cells in the vitreous. Posterior uveitis or chorioretinitis is the inflammation of the retina and choroid. Pan-uveitis is the inflammation of all layers of the uvea(Iris, ciliary body and choroid). Treatment
Uveitis is typically treated with glucocorticoid steroids, either as topical eye drops (prednisolone acetate) or as oral therapy. Prior to the administration of corticosteroids, corneal ulcers must be ruled out. This is typically done using a fluorescence dye test. In addition to corticosteroids, topical cycloplegics, such as atropine or homatropine, may be used.
Or or OR may refer to:

Arts and entertainment
Film and television
"O.R. ", a 1974 episode of M*A*S*H
Or (My Treasure), a 2004 movie from Israel (Or means "light" in Hebrew)

Music
Or (album), a 2002 album by Golden Boy with Miss Kittin
O*R, the original title of Olivia Rodrigos album Sour, 2021
"Or", a song by Israeli singer Chen Aharoni in Kdam Eurovision 2011
Or Records, a record label
Organized Rhyme, a Canadian hip-hop group featuring Tom Green

Businesses and organizations
Or (political party) (lit.