Eyelash
An eyelash or simply lash is one of the hairs that grow at the edge of the eyelid. more...
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Eyelashes protect the eye from debris and perform some of the same function as whiskers do on a cat or a mouse in the sense that they are sensitive to being touched, thus providing a warning that an object (such as an insect or dust mote) is near the eye (which is then closed reflexively).
Human eyelashes
The eyelashes of the embryo develop between the 7th and 8th week. An eyelash takes about four months to grow. Their color may differ from that of the hair and they take longer to grow white.
The follicles of eyelashes are associated with a number of glands known as the glands of Zeiss and the glands of Moll.
Cosmetics
Long eyelashes are considered a sign of femininity in most if not all cultures. Kohl has been worn as far back as the Bronze Age to protect and enhance lashes.
Complete eye makeup includes mascara, eyeliner and eye shadow to emphasize the eyelashes. The twentieth century saw the beginning of convincing-looking false eyelashes, popular in the 1960s.
Health
There are a number of diseases or disorders involving the eyelashes:
Madarosis is the loss of eyelashes;
Blepharitis is the irritation of the lid margin (where eyelashes join the eyelid). Eyelids are red and itching. The skin often becomes flaky. The eyelashes may fall.;
Distichiasis is the abnormal growth of lashes from certain areas of the eyelid.;
Trichiasis is ingrown eyelashes;
Eyelashes may become infested with crab louse parasites;
An external hordeolum, or stye, is a purulent inflammation of infected eyelash follicles and surrounding sebaceous (Zeis) and apocrine (Moll) glands of the lid margin.;
Trichotillomania is a disorder that urges the sufferer to pull out scalp hair, eyelashes, etc.;
Demodex folliculorum (or the demodicid), is a small mite that lives, harmlessly, in eyelash follicles and around 98% of us have these mites living in our lashes and/or hair.;
Eyelash and eyebrow transplant surgeries may help to reconstruct or thicken lashes or eyebrow hair.
Animals
Lashes, being hair, are found in mammals. Camels' lashes are remarkably long and thick. Horses, cows, and also ostriches, (vestigial feathers without barbs) feature eyelashes as well.
Inherited eyelash problems are common in some breeds of dogs.
Read more at Wikipedia.org
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