Chorioretinal changes, juxtapapillary staphyloma, and retinal detachment occur in the collie.1-4 These abnormalities are familial and may be interrelated. This report describes ophthalmoscopic studies and presents a concept which may explain the occurrence of retinal breaks in these animals.
Materials and Methods
A total of 33 collies was obtained from British Columbia, California, Colorado, New England, New York, Ohio, Texas, and Wisconsin. There were 15 males and 18 females, ranging in age from 4 weeks to 4 years. Of the 33 animals, 21 were sable, 11 were tricolored, and 1 was white; 4 had smooth and 29 had rough coats.The collies were individually isolated at the Retina Foundation Research Kennel. History and physical examination revealed no manifestations of distemper, infectious hepatitis, or infection of the eyes or central nervous system. The pupils were maximally dilated with 1% cyclopentolate and 10% phenylephrine in order to examine the fundi by
FREEMAN HM, DONOVAN RH, SCHEPENS CL. Retinal Detachment, Chorioretinal Changes, and Staphyloma in the CollieI. Ophthalmoscopic Findings. Arch Ophthalmol. 1966;76(3):412-421. doi:10.1001/archopht.1966.03850010414022