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Dry Eye (Keratoconjunctivitis Sicca) in Dogs

continued...

Cyclosporin ointment is applied to the surface of the involved eye. The frequency of application must be determined by your veterinarian. The effect is not immediate. Artificial tears and topical antibiotics should be continued until the Schirmer tear test indicates that the volume of tears is adequate.

Treatment is life-long. Interrupting cyclosporin for as little as 24 hours causes symptoms to reappear in 90 percent of dogs. This can be reversed by resuming treatment.

When damage to the lacrimal glands leaves little or no functioning tissue, cyclosporin is not likely to be effective. Artificial tears (drops and ointments) prescribed by your veterinarian must then be instilled into the dog’s eyes several times a day for life. Ointments are less expensive and do not need to be applied as frequently as drops. Saline drops should not be used because they aggravate the problem by washing away the lipid layer of the tear film.

A topical mucolytic agent containing acetylcystine may be recommended to reduce heavy mucus accumulation. Topical antibiotics are indicated whenever the mucus discharge becomes purulent. Topical corticosteroids may be prescribed by your veterinarian in some circumstances to decrease inflammation. In the presence of corneal ulceration, corticosteroids are contraindicated because they predispose a dog to rupture of the cornea.

Surgical treatment can be considered as a last resort when medical management fails. The operation involves transplanting the duct of the parotid salivary gland up into the corner of the eye. The saliva takes the place of the tears. The operation has several significant disadvantages. One is that the volume of tears may be more than the drainage system can handle. This can result in a watery eye and the accumulation of mineral deposits on the cornea and face.

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WebMD Veterinary Reference from "Dog Owner's Home Veterinary Handbook"

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