**1. Introduction**

Uveitis is the third leading cause of preventable blindness worldwide although its incidence is relatively infrequent. Over 2 million people worldwide may be affected by uveitis. Its prevalence in the States is estimated as 15 per 100,000 and worldwide as 38-730 per 100,000. [1], [2] Females have a higher prevalence and the prevalence in both genders increases with increasing age. [3]

Uveitis may be accompanied by normal, low or high intraocular pressure (IOP). If the IOP is higher than 21mmHg, it is defined as glaucoma and as all the secondary glaucomas, the op‐ tic disc and the visual field may be normal. This is in contrast to primary glaucomas, where the high IOP should be accompanied by either abnormal optic disc or visual field or both.

Uveitic glaucoma refers to glaucoma that develops in uveitic patients. The glaucoma in these cases is secondary to or concurrent with uveitis. This is a narrow definition of uveitis and glaucoma even if since it does not include cases of uveitis that develop in glaucoma pa‐ tients. Uveitic glaucoma is composed of different ocular diseases of different causes and mechanisms. Between 10% and 20% of the uveitis patients develop glaucoma. [4]-[6] The de‐ velopment of glaucoma is more common in chronic than in acute uveitis glaucoma and may reach 46%. [7] There is no predilection to race or gender.

Any uveitis may be accompanied by glaucoma. Nevertheless, in glaucomatocyclitic crisis or Posner Schlossman disease, both intraocular inflammation and high IOP always concur while in others such as Fuchs' heterochromic iridocyclitis they appear in high association or with lesser association.

© 2013 Rumelt; licensee InTech. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. © 2013 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
