Eyelash
| Eyelash | |
|---|---|
Human eyelashes
|
|
| Details | |
| Identifiers | |
| Latin | Cilium |
| Greek | Bλέφαρον (blépharon) |
| MeSH | D005140 |
| TA | A15.2.07.037 |
| FMA | 53669 |
|
Anatomical terminology
[]
|
|
An eyelash or simply lash is one of the hairs that grows at the edge of the eyelid. 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) is near the eye (which then closes reflexively).
The Ancient Greek word for eyelash is βλέφαρον (transliterated as blepharon), which is seen as a root in biological terms like Blephara and Katoblephara.
The eyelashes of the embryo develop from the ectoderm between the 22nd and 26th week of pregnancy. Eyelashes take about seven to eight weeks to grow back if pulled out but constant pulling may lead to permanent damage. Their color may differ from that of the hair, although they tend to be dark on someone with dark hair and lighter on someone with light hair. Eyelash hair is not androgenic and is therefore not affected by puberty.
The follicles of eyelashes are associated with a number of glands known as the glands of Zeis and the glands of Moll.
There are a number of diseases or disorders involving the eyelashes:
Eyelash and eyebrow transplant surgeries may be help to reconstruct or thicken lashes or eyebrow hair.
Long eyelashes are considered a sign of beauty in many cultures. Accordingly, some women seek to enhance their eyelash length artificially, using eyelash extensions. On the other hand, Hadza women are known to trim their own eyelashes.
Kohl, a black putty (usually antimony sulfide or lead sulfide), has been worn as far back as the Bronze Age to protect and enhance lashes. In Ancient Egypt, it was used as well by the wealthy and the royal to protect their eyes from the sand, dust, and bugs. Modern eye makeup includes mascara, eyeliner, eye putty, and eye shadow to emphasize the eyes. The twentieth century saw the beginning of convincing false eyelashes, popular in the 1960s. There are also different tools that can be used on the lashes such as eyelash curler or mascara shield (also named mascara guard or eye makeup helper).
...
Wikipedia