Clinical Equine Ophthalmology Practice Test

Chorioretinitis often presents with depigmentation in the non-tapetal retina surrounding the optic nerve head. This region lacks the tapetum lucidum, so inflammatory damage to the retinal pigment epithelium here results in visible pigment loss around the disc. The dorsal tapetal area isn’t where this characteristic depigmentation is seen. Peripheral retina changes can occur with various conditions, but the classic site for chorioretinal depigmentation is around the optic disc in the non-tapetal zone. Also, the fovea centralis is not a feature of the equine retina, so that site isn’t typically involved.