Your eyeglasses should contrast, not mimic, the shape of your face. Here’s a quick guide, courtesy of renowned eyeglass designer Richard Morgenthal.

Your shape: Heart
Your specs: A heart-shaped face already has a lot of definition. Since your head is top-heavy, go for a geometric frame that gives some width to the lower half of your face.

Your shape: Square
Your specs: Since a square face already has angles, go for a round or oval frame that shapes your cheekbones. A decorative frame with width will often do the trick.

Your shape: Round
Your specs: Avoid dark frames; they only make your face appear heavy. A round face needs direction, so opt for angular and narrow frames-never a square or a circle.

Your shape: Oval
Your specs: A modern rectangle is best for an oval face. Because your face is longer than it is wide, you’ll need frames that provide width. If your face is wider than it is long, go the opposite way.