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Online Journal of Veterinary Research

(Including Medical and Laboratory Research)

Established 1994

ISSN 1328-925X


Volume 28(5): 288-292, 2024.

Pupillotonia in a Spitz dog: A case report


Ali Asghar Sarchahi


Clinical Sciences, School of Veterinary Medicine, Shiraz University, Iran




Sarchahi AA., Pupillotonia in a spitz dog: A case report, Onl J Vet Res., 28(5): 288-292, 2024. A eight year old female Spitz dog was referred with signs of anisocoria. Clinical examinations revealed mydriasis in right eye. By pupillary light reflex, right pupil had no response to strong light directed to either eye but left pupil had a positive direct and indirect response to strong light. By ophthalmoscopic examination, lens, vitreous, retinas and optic nerves were considered normal. The eyelids, corneas and irides were also normal. Intraocular pressures were within normal limits. We diagnosed parasympathetic denervation of right iris sphincter muscle pupillotonia confirmed by drop of 2% pilocarpine instilled in right eye where right pupillary diameter equaled left eye.


Key words: anisocorea, dog, eye, japanese spitz, pupillotonia.