Peer-reviewed veterinary case report
Congenital stationary night blindness in a Thoroughbred and a Paso Fino.
- Journal:
- Veterinary ophthalmology
- Year:
- 2005
- Authors:
- Nunnery, Catherine et al.
- Affiliation:
- Virginia-Maryland Regional College of Veterinary Medicine · United States
- Species:
- horse
Plain-English summary
This report discusses congenital stationary night blindness (CSNB), a condition that affects vision in low light, in two horse breeds: a Thoroughbred and a Paso Fino. Both horses showed signs of vision problems from birth, but their eye structures looked normal during exams. In the Thoroughbred, they monitored the horse for nine years, while the Paso Fino had severe vision issues from birth until about one year old, which led to the difficult decision to euthanize the horse. The condition was confirmed through tissue examination after euthanasia.
Abstract
This report documents congenital stationary night blindness (CSNB) in two non-Appaloosa horse breeds (Thoroughbred and Paso Fino). History of vision impairment since birth, normal ocular structures on ophthalmic examination, and electroretinographic findings were consistent with CSNB. In one horse (Thoroughbred), a 9-year follow-up was carried out. In the Paso Fino, severe vision impairment from birth to approximately 1 year of age in both dim and bright light situations led to humane euthanasia and histopathologic confirmation of the disorder.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/16359365/