Eyelid makeup, also known as eyeliner, is a cosmetic product used to define the eyes. It is applied to the upper and lower lash lines to create a variety of looks, from subtle to dramatic. LINER is a type of eyelid makeup that is applied with a brush or pencil and comes in a variety of colors. It is used to create a defined line along the upper and lower lash lines, and can be used to create a smoky eye look.