Primary Canine Glaucoma

Glaucoma in animals is a critical condition marked by increased intraocular pressure (IOP), leading to retinal and optic disc damage. It results from impaired outflow of aqueous humor, either through the trabecular meshwork or uveoscleral network. The condition can be primary, often inherited, or secondary to other ocular diseases. In dogs, primary breed-predisposed glaucoma is notably common, and in cats, it's mostly secondary to conditions like anterior uveitis. Diagnosis involves tonometry and ophthalmoscopy, with gonioscopy and high-frequency ultrasonography being helpful for prognosis. Treatment varies, ranging from medical management with drugs like miotics and carbonic anhydrase inhibitors to surgical interventions in more severe cases. 

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References:

Veterinary Merk Manual. Glaucoma in Animals.