Introduction
- Cause : hereditary disorder of the Collie and Shetland Sheepdog → choroidal hypoplasia and defects of the papillary or peripapillary tissues (colobomata)
. - Signs : visual impairment.
- Diagnosis :diagnosis of mild chorioretinal lesions by ophthalmoscopy in some dogs may be difficult due to masking of choroidal hypoplasia by melanin and the absence of other obvious visual deficits.
- Treatment : none available.
- Prognosis : a small proportion of animals may present with further complications of the disease such as retinal non-attachment/detachment and intraocular hemorrhage.
Diagnosis
Clinical signs
- Choroidal hypoplasia superior and temporal to the optic disk.
- Colobomata .
- Retinal dysplasia/folds.
- Retinal vessel tortuosity.
- Micropthalmia.
- Retinal detachment .
- Intra-ocular hemorrhage .
Sources
Publications
Other sources of information
- Gelatt K N (1999) Veterinary Opthamology. : 3rd edn: Williams & Wilkins.
