Читать книгу Essentials of Veterinary Ophthalmology - Kirk N. Gelatt - Страница 69

In horses, the cilia are long and numerous on the upper eyelid, except near the medial canthus. Horses blink at about 19 blinks/min, approximately one‐third of which are minimal incomplete, one‐third of which are moderate incomplete, and one‐third of which are complete, with only 6% of the blinks having a complete squeeze. Lid closure is approximately twice as rapid as lid opening. Eyelids are open at birth. Also, long tactile hairs, or vibrissae, are present on both the dorsal brow and lower eyelid. The vibrissae are long, stout, single shafts of hair that are usually thicker than adjacent skin hair; they may provide additional sensation for the eyelids.