An eyelash (also called lash) (Neo-Latin: cilium, plural cilia) is one of the hairs that grows at the edges of the top and bottom eyelids, spanning outwards and away from the eyes.[1] Eyelashes serve to protect the eye from debris, dust, and small particles, and are highly sensitive to touch, thus providing a warning that an object (such as an insect or lint) is near the eye, which then reflexively closes or flutters to rid the area of the object.Lashes longer or shorter than one-third the width of the eye have been shown to have reduced efficacy in serving their function.[13] Eyelashes grow outwards from both upper and lower eyelids, with varying degrees of curl.Prominent, luscious eyelashes have long been considered a sign of beauty in many cultures, almost universally,[23] and as such are highly coveted, particularly by women.[27] Nonetheless, an average length eyelash is considered the most attractive across Asian, Indian, Black and White faces.[28] Ancient Romans considered long eyelashes a component of aesthetically ideal eyes.Pliny the Elder wrote that eyelashes fell out from sexual excess, so women desired long lashes as a symbol of chastity.[34] Latisse was introduced in the first quarter of 2009 by Allergan as the first drug to receive FDA approval for eyelash growth.Latisse is a solution of bimatoprost, a prostaglandin analog and the active component of the glaucoma medication Lumigan.[36] Cosmetic companies have recently relied on scientific research of prostaglandins and the Wnt/b-catenin signaling pathways to develop eyelash products.[37] Some cosmetic brands have begun using peptides in their formulation rather than prostaglandins because of regulatory rules in places like Canada and California.
The length of eyelashes in humans vary greatly by individual, but not by sex or ethnicity. Short eyelashes are shown in this female subject
Long eyelashes are coveted as a sign of beauty and are considered an attractive facial feature in many cultures. This adult male has
trichomegaly
with notably prominent upper lashes measuring 14 mm long, well over the 10 mm normally considered to be long.
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Ancient Meitei character "PAA" (ꯄ) represents as well as means "eyelash"