Comparison of Clinical Characteristics between Rubella Virus and Cytomegalovirus Associated Chronic Unilateral Anterior Uveitis.

To identify the clinical characteristics that may predict the diagnosis of Rubella virus (RV) or Cytomegalovirus (CMV) among cases of chronic treatment resistant or steroid dependent unilateral anterior uveitis (AU). Thirty-three consecutive patients with a diagnosis of CMV and 32 patients with RV chronic AU were enrolled. The respective frequency of certain demographic and clinical characteristics was compared between the two groups. The presence of abnormal vessels in the anterior chamber angle (75% and 6.1%, respectively, p <.001), vitritis (68.8%–12.1%, p <.001), iris heterochromia (40.6%–15.2%, p =.022) and iris nodules (21.9%–3%, p =.027) were more common among RV AU. Conversely, intraocular pressure greater than 26 mmHg was more commonly encountered in CMV associated AU (63.6%–15.6%, respectively, p <.001) and large keratic precipitates were detected only in CMV-associated AU. RV- and CMV-induced chronic AU differ significantly in the prevalence of specific clinical characteristics. [ABSTRACT FROM AUTHOR]