Of course those Prada eyeglasses will make you look smarter and sexier—they were designed to. And at that price, how could they not? The trick is to find frames that transform your face but not your wallet. At the charming Cobble Hill eyeglasses boutique Insight Optical, you can browse through shelves filled with designer specs by Calvin Klein (from $165), Cynthia Rowley (from $150), Ray-Ban (from $75), Modo (from $165), and, of course, Prada (from $175). They’re priced low enough that you’ll be asking “What about these?” every time you try a new pair. (306 Court Street, Cobble Hill, Brooklyn; 718-596-3740.)