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Related: Culture Forums, Support Forumsdixiegrrrrl
(60,010 posts)ailsagirl
(22,899 posts)I never knew the eyelids actually ripple!!
Anny61
(100 posts)Baitball Blogger
(46,756 posts)dhol82
(9,353 posts)Doodley
(9,119 posts)eppur_se_muova
(36,281 posts)The eyelid basically wipes any dust, discharge, old tears, and other debris toward the "drain". There is a continuous flow of tears from the tear glands above the outer (temporal) side of the eye towards the duct at the inside corner.
https://www.mayoclinic.org/-/media/kcms/gbs/patient-consumer/images/2013/11/15/17/42/ds00463_-ds01096_im02751_r7_tearglandthu_jpg.ashx
This raises an obvious question: Do reptiles, and other animals with a nictitating membrane, blink in a different fashion ? I suspect they do, and that what we see in the video is the mammalian alternative to that "third eyelid". (According to Wikipedia, some mammals, mostly aquatic to some degree, do have a nictititating membrane as well.)