• Uveitis is a general term that refers to a group of ocular disorders characterised by inflammation of the eye’s structures responsible for its blood supply.
• These structures are collectively known as the uveal tract, and include the iris, ciliary body, and choroid.
• Uveitis is classified by the structures it affects, the underlying cause and whether it is chronic (lasting more than 6 weeks), or acute in nature.
• There are four main categories of uveitis. i) anterior uveitis (also known as iritis involving the iris and ciliary body ; it is the most common type, ii) intermediate uveitis which affects the ciliary body, iii) posterior uveitis which involves the choroid and iv) pan-uveitis which affects structures both in the front and back of the eye.

Link: eyewiki.aao.org/Category:Uveitis