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Discussion on Night Blindness in a Thoroughbred and a Paso Fino.
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Moderator:
DrO
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Posted on Monday, Jan 9, 2006 - 10:27 am:
Though I had heard reports that congenital night blindness occurred in other breeds, I had not seen any first hand reports. This came across our desk and looked like a good time to write a new article on this not to uncommon problem with Appaloosas.
Vet Ophthalmol. 2005 Nov-Dec;8(6):415-9.
Congenital stationary night blindness in a Thoroughbred and a Paso Fino.
Nunnery C, Pickett JP, Zimmerman KL.
Virginia-Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0442, USA.
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.
For more information see the article associated with this forum by clicking on "Night Blindness in Horses" on the navigation bar at the top of this page.
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