Читать книгу Essentials of Veterinary Ophthalmology - Kirk N. Gelatt - Страница 70

In cattle, sheep, and pigs, the upper eyelid is the most mobile, largest, and has the majority of cilia. Pigs, rabbits, rodents, and some ruminants have a deeper separate structure, the Harder's gland or harderian gland, in addition to the superficial gland of the NM. This gland secretes lipids, porphyrins, indoles, and growth factors, and is thus also important for lubrication of the eye. In the pig, the meibomian glands are poorly developed, and the primary eyelid glands are sweat glands. Eyelids are open at birth in these species.