Congenital stationary night blindness in a Thoroughbred and a Paso Fino.
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.
Nunnery
Catherine
C
Virginia-Maryland Regional College of Veterinary Medicine, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0442, USA.
Pickett
J Phillip
JP
Zimmerman
Kurt L
KL
D000818:Animals; D001947:Breeding; D004596:Electroretinography / Q000379:methods / Q000662:veterinary; D017809:Fatal Outcome; D006734:Horse Diseases / Q000151:congenital* / Q000473:pathology; D006736:Horses; D008297:Male; D009755:Night Blindness / Q000151:congenital / Q000473:pathology / Q000662:veterinary*; D017949:Retinal Cone Photoreceptor Cells / Q000503:physiopathology*; D014792:Visual Acuity