Congenital glaucoma in a tiger (Panthera tigris)

Abstract

Glaucoma is a group of diseases where increased intraocular pressure (IOP) causes progressive damage to the optic nerve and extensive loss of retinal ganglion cell bodies leading to vision loss. 1,2 Secondary glaucoma accounts for 95%-98% of cases in domestic cats. 1,3 Primary glaucoma has been reported in Siamese, European short-haired, Burmese, and Domestic short-haired breeds. [4][5][6][7] Open-and narrow-angle are most commonly reported in cats, 2,6,7 with closed-angle primary glaucoma described in only two Burmese cats. 6 Congenital glaucoma is rare in cats but has been documented in Siamese cats. [8][9][10] Although there are shared clinical signs with open-angle primary and secondary glaucoma, the degree of buphthalmos can be more severe due to decreased scleral rigidity in young animals. 8 There are often other ocular malformations concurrent with