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 typically grow in cycles, with each lash having a lifespan of several months before falling out and being replaced. Many people use cosmetics, such as mascara, to enhance the appearance of their eyelashes, making them look longer and fuller.