Etiologies
Idiopathic = 31.4% Seronegative spondyloarthropathies = 21.6% Juvenile rheumatoid arthritis = 10.8% Herpetic = 9.7% HLA-B27 associated AU = 6.4% Sarcoidosis = 5.8%	Fuchs' heterochromic iridocyclitis = 5.0% Lupus = 3.3% Lens-induced persistent uveitis = 1.2% Rheumatoid arthritis = 0.9% Glaucomatocyclitic crisis =0.9%
These stats were published in a study done in 1996 by the Massachusetts Eye and Ear Infirmary. Researchers looked at more than 1200 people over the course of 10 years. This table lists the most common conditions found to be associated with AU in their patient population, which was predominantly Caucasian and mostly from the Northeast.

Signs of Anterior Uveitis
Circumlimbal flush	Keratic percipitates	Posterior synechiae
Photos courtesy of Brad Sutton, OD, IU School of Optometry

Flare in anterior chamber Photo courtesy of IU School of Optometry

Differential Diagnosis of Cells in the Anterior Chamber White blood cells Red blood cells (microhyphema): Use red free filter (if cells disappear then they are rbc's) Pigment cells--brown Tumor cells Spillover from vitreous

	URL: http://www.opt.indiana.edu/ce/antuve/etiosign.htm Revised: May 27, 2008
	IU Optometry home page: http://www.opt.indiana.edu/ Comments (content): Dr. Julie Torbit at jtorbit@indiana.edu Comments: Web Administrator Page design and coding: Terri Greene Copyright © 2008, The Trustees of Indiana University