Study of the prevalence and type of ophthalmic diseases amongdifferent breeds of horses in Tehran riding clubs

The aim of this study was to determine the prevalence and type of ophthalmic diseases among horse populations in the suburbian riding clubs oftehran. ophthalmologic examinations were performed in 901 horses and ocular lesions were diagnosed in 40 (4.4%) animals. in the 54 eyes of these horses that had ocular defects, 103 ocular abnormalities were detected. of those horses affected, 65% showed abnormalities in one eye and 35% had abnormalities in both eyes. various sequelae to ocular trauma and periodic ophthalmia were the most common and recognizable causes, which comprised25%and15%of horses with ocular defects, respectively.