Eyelashes are short, hair-like structures that grow along the edges of the eyelids. They serve several important functions, including protecting the eyes from dust, debris, and small particles. Eyelashes also help to reduce the amount of light that enters the eyes, which can be beneficial in bright conditions. Eyelashes can vary in length, thickness, and color among individuals. They are made of a protein called keratin, similar to hair on the scalp. Many people enhance their eyelashes using products like mascara or false eyelashes to achieve a fuller or longer appearance, often for cosmetic reasons in beauty routines.