Today's Veterinary Practice

JUL-AUG 2015

Today's Veterinary Practice provides comprehensive information to keep every small animal practitioner up to date on companion animal medicine and surgery as well as practice building and management.

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tvpjournal.com | July/August 2015 | TodAy's VeTerinAry PrAcTice obserVATions in oPhThAlmology Peer reviewed 71 eyelid disease is a common clinical challenge for general practitioners. erythema, alopecia, edema, and conjunctival hyperemia are hallmark signs that occur due to pronounced vascularity of the eyelids. infammation may be focal or diffuse, affecting one or both eyes, with variable involvement of all 4 eyelids. This article reviews common clinical presentations of canine blepharitis, and provides a systematic approach to eyelid disease for the general practitioner. ANATOMY: REVIEW OF EYELIDS & TEAR FILM Eyelids The eyelids primarily: 1,2 • Protect and exclude light from the eye • Produce a portion of liquid tears • Provide a mechanism to spread preocular tear film across the cornea and bulbar conjunctiva. eyelids are upper and lower folds of skin continuous with the planes of the facial skin. 1 The edges of the upper and lower eyelids meet to form the lateral and medial canthi (Figure 1). The eyelids rest on the globe, and while the upper eyelid contains 2 to 4 rows of cilia (eyelashes), the lower eyelid does not contain cilia. 1 The modified sweat glands, referred to as the glands of Moll, open onto the eyelid margin near the base of the cilia. The glands of Zeis are sebaceous glands that are found in the tarsal plate and open onto the eyelid margin posterior to the cilia. clinical Approach to canine eyelid disease: Blepharitis Brian L. White, DVM, and Ellen B. Belknap, DVM, MS, Diplomate ACVO & ACVIM (Large Animal) Metropolitan Veterinary Hospital, Akron, Ohio FIGURE 1. Anatomy of the eye: Third eyelid (a), medial canthus (B), nasolacrimal duct (C), inferior lacrimal punctum ( D), meibomian glands (e), orbicularis oculi muscle (F), lateral canthus (G). Courtesy Dr. Lisa Wirth

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