Viral anterior uveitis.

Anterior uveitis has various causes, but the majority of cases are viral induced. The most common viral anterior uveitis etiology includes double-stranded DNA viruses of the Herpesviridae family, including Alpha herpes virinae (herpes simplex 1 and 2 and varicella zoster virus), Beta herpesvirinae (cytomegalovirus), and less frequently, Gamma herpesvirinae (Epstein-Barr virus). In the last few decades, a growing body of evidence has correlated Fuchs uveitis etiology to the rubella virus from the Matonaviridae family, which has a single-stranded RNA genome. The clinical presentation of each of these uveitis is hypertensive granulomatous anterior uveitis; however, the very slight differences between them, which often overlap, make differential diagnosis sometimes difficult. Therefore, diagnostic laboratory tests such as polymerase chain reaction and antibody index or Goldmann-Witmer coefficient analyses on the aqueous humor help to identify the etiology in doubtful cases and thus to plan targeted treatment.