Eyelashes are human hairs on the upper and lower eyelids
Eyelashes are human hairs on the upper and lower eyelids. Each eyelid has layers of eyelashes within a row, we can have three to five layers of eyelashes in the eyelid, which protect and frame the eyes.
In every blink the eyelashes close access to the eyes like curtains. And, in every blink, the eyes are irrigated with a lubricant secretion from sebaceous glands -tear glands- running along the edge of the eyelid, with their openings between the eyelashes. This lubrication ensures that the eyes don't dry out, keeping them wet and healthy.