Eyelid

Chapter 1 Eyelid



INTRODUCTION


The eyelids are composed of skin, eyelid muscles, eyelid glands (particularly the meibomian glands), and the palpebral conjunctiva, which lines the inner surface of the eyelids. The eyelids are affected by conditions that affect skin elsewhere on the body and a variety of anatomic abnormalities, as well as conditions that involve the conjunctiva and eyeball. Many eyelid abnormalities seen in dogs are breed related (e.g., distichia, entropion, and ectropion). Inflammatory diseases (e.g., blepharitis) may be associated with more widespread dermatitis. Various tumors may affect the eyelids in older animals and are illustrated in this chapter. Because the integrity of the eye may be affected by eyelid disease, careful observation and accurate diagnosis are important.





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Figure 1-3 Right eye of cat in Figure 1-2. The upper eyelid agenesis involves most of the eyelid and lateral canthus—the most common location for eyelid agenesis in cats. Pigment is present on the cornea as a result of chronic exposure and because hair has come in contact with the cornea. The defect is corrected by the grafting of skin and conjunctiva to fill the defect. A mature cataract is present and is an unrelated problem.


























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Jul 31, 2016 | Posted by in INTERNAL MEDICINE | Comments Off on Eyelid
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