[sidebar] You Want More CurlGently warm an eyelash curler using a hair dryer for 5 seconds, and then hold it at the base of lashes for 3 seconds, says Los Angeles makeup artist Amy Chance. The heated curler works like a mini hair iron, and the curled lashes make eyes look more open. Use: With its curved wand, Clinique High Impact Curling Mascara ($16; clinique.com) sweeps lashes up. Starting close to the root, wiggle the wand back and forth as you coat from base to tip. You Want Longer LashesTry a mascara with fibers, says Perry Romanowski, a cosmetic chemist in Chicago. No, it’s not just a marketing ploy—these mascaras have particles that build upon one another to add length. Think: extensions for your eyelashes. Use: Maybelline New York Illegal Length Fiber Extensions Mascara ($9; maybelline.com) has 4 mm-long fibers that seal to lashes, yielding impressive dimension. You Want Thicker Eye LashesFirst apply a volume-boosting primer, such as Rimmel London Lash Accelerator Serum ($9; us.rimmellondon.com). It has PVP (polyvinylpyrrolidone), a durable film that makes lashes look more substantial, says Romanowski. Use: The hourglass brush of Trish McEvoy Thickening Mascara ($30; trishmcevoy.com) has long and short bristles that seize each lash. Layer on two coats for the best results. More from Prevention: 5 Meltproof Mascaras