Throughout this document taxa are listed according to their general host range. Each type species name is preceded by the name of the order, family and genus it belongs to. Taxa names in quotes indicate that this taxon does not have an ICTV approved name.hroughout this document taxa are listed according to their general host range. Each type species name is preceded by the name of the order, family and genus it belongs to. Taxa names in quotes indicate that this taxon does not have an ICTV approved name.
Any part of the uveal tract can become inflamed[md]the iris (iritis), the ciliary body (cyclitis), or the choroid (choroiditis). More than one part may be involved at the same time (iridocyclitis). The terms ''iritis' and ''uveitis' are often used loosely and interchangeably, and we will do the same here. Although iridocyclitis may be caused by bacteria invading the eye through a corneal ulcer (24.3), it and other forms of uveitis are more often due to a sterile inflammation, usually from an unknown cause. Uveitis of several kinds is common in the developing world. Iritis (more strictly iridocyclitis) has several consequences: (1) A patient's inflamed iris may stick to his lens by posterior synechiae (adhesions, common) or less often to the back of his cornea by anterior synechiae.
1 Iritis is an inflammation of the iris, or colored part of the eye, that causes deep eye pain, usually accompanied by blurred vision and light sensitivity. 2  Optic neuritis is an inflammation of the optic nerve. 3  The optic nerve connects to the back of the eye.