To curl or not to curl -- that is the question. When it comes to lengthening those lashes, most of us will go to great lengths to achieve a bright-eyed look. From pricey products to eyelash extensions, we go batty for anything and everything that will enhance our eyes. Ironically, the secret ingredient to a lovelier look is right at your fingertips -- and it can be yours for under $5. We're talking about the...