Superficial Punctate Keratitis

Superficial punctate keratitis is seen most commonly, but not exclusively, in the Shetland Sheepdog and Longhaired Dachshund. Clinically it appears as multiple, punctate or circular, gray, superficial corneal opacities that may or may not be ulcerated (Figure 11.22). The condition is bilateral and lesions are frequently symmetric. When ulcerated, dogs demonstrate signs of discomfort (e. g., epiphora and blepharospasm). The corneal ulcers are typically recurrent and lesions can progress to

Figure 11.22. Dachshund with superficial punctate keratitis.

Crystalline corneal deposits and diffuse corneal edema, pigmentation, and vision loss. The pathogenesis of this condition is unknown, but superficial punctate keratitis has been suggested to be an immune-mediated or dystrophic corneal disease. Treatment consists of topical cyclosporine or corticosteroids combined with a topical antibiotic when ulcerations are present. The clinical response to therapy is typically rapid. Long-term maintenance therapy with cyclosporine may prevent recurrence of corneal ulcers.

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