An eyelash or simply lash is one of the hairs that grow 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 or dust mite) is near the eye (which is then closed reflexively).The eyelashes of the embryo develop between the 7th and 8th week. Eyelashes will grow back if they fall out or get pulled out. Eyelashes take about seven to eight weeks to grow back. 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.Long eyelashes are considered a sign of femininity in most if not all cultures.
Accordingly, some women seek to enhance their eyelash length artificially to appear more feminine and sexually desirable. See also eyelash extensions.
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 eyes. The twentieth century saw the beginning of convincing-looking false eyelashes, popular in the 1960s.