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Iris Cysts

Iridociliary Cysts in Dogs

Iridociliary cysts, also known as iris cysts or uveal cysts in dogs, are typically benign and usually do not necessitate any form of treatment. However, in some instances, they might grow large enough to obstruct vision or impair the eye’s function.

Symptoms and Types

Iridociliary cysts can be connected to different regions within the eye. They might exhibit light or dark pigmentation and possess a semitransparent quality. Their shape can range from spherical to ovoid, and they can vary significantly in size, with the possibility of multiple cysts present. These cysts may manifest in one or both eyes.

In most instances, the discovery of these cysts is incidental. They only become problematic when they reach a size sufficient to impede vision or disrupt normal eye function. Glaucoma is a potential complication associated with iridociliary cysts.

Causes

Cysts can either be congenital or acquired.

  • Congenital cysts stem from developmental abnormalities in the eye, with affected dogs being born with these cysts.
  • Acquired cysts may result from eye trauma or uveitis (inflammation of the dark layers of the eye). Often, the cause remains unknown.

Certain breeds like Boston terriers, golden retrievers, and Labrador retrievers are predisposed to iridociliary cysts. Golden retrievers, in particular, may exhibit a syndrome involving pigmentary uveitis and iridociliary cysts. These cysts have also been linked to glaucoma in both golden retrievers and Great Danes.

Diagnosis

Iridociliary cysts are typically identified through an ocular examination.

Treatment

In the majority of cases, treatment is not required. However, if there is uveitis or glaucoma, these conditions will need appropriate treatment. Laser coagulation may be employed to remove particularly large cysts if deemed necessary.

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