EYELIDS

This chapter presents information on the eyelids of canines and felines. The palpebral fissure is defined by the upper and lower eyelids. The medial and lateral canthi are supported by the medial and lateral palpebral ligaments, which attach to the frontal and zygomatic bones, respectively. The medial canthus contains a thickened caruncle of tissue, typically covered with finely haired skin. In addition, the levator palpebre superioris muscle extends from the deep orbital tissues to the upper eyelid and serves to elevate the upper lid. Finally, the medial canthus contains the nictating membrane, comprising a fold of palpebral conjunctiva supported by a T-shaped cartilaginous frame. The chapter also provides a colorful illustration of the anatomy of the eyelids.