A perfect base for your eye shadow, eye primers intensify the color of your favorite eye shadow colors and help them stay all day from your subtle office day look to date-party look. Liners, shadows can end up looking like a creased, smudged mess at the edge of the day if you don't use a good primer. Eye primer makeup comes in a gel-like form that you can put on your eyelid before applying eyeshadow. It ensures that the shadow will stay on your lids and look the way it was meant to look on your skin. It also prevents eye shadow from creasing on your lids and makes it long-lasting.