The sun, like a hotheaded black belt, will blind you if you look at it the wrong way. Look good as you screen yourself from the sky's blinding flashbulb with today's Groupon: for $50, you get $175 worth of designer sunglasses at Tower Optical in Richmond Heights.

Tower Optical is the stylish spawn of St. Louis's longest-running ophthalmologic practice, Clinical Ophthalmology. The eye-shield shrine is the retail section of Clinical and home to a horde of designer brands, including Vera Wang ($250+), Brooks Bros. ($150+), Coach ($250+), and J. Lo's own line of optical orb protectors ($165+). Break down the brightness while becoming the envy of neo-hipster friends with a pair of authentic Rayban wayfarers. If you're feeling self-conscious about your eyes' square-shaped irises, invest in a pair of mirrored eyewear, which strategically deflect the evil eye from frenemies while allowing true friends to check their teeth.

Tower Optical's certified optician will help you select the frames that best accent your face's antlers and make you resemble your favorite movie star, be it Burton Gilliam or James Hong. Adjustments and cleaning are on the house, and Tower's parent practice, Clinical Ophthalmology, is available for eye examinations, contact lens services, anime eye surgery, and more.

This Groupon is not valid toward the purchase of Maui Jim brand sunglasses.