Eyeglasses correct vision, make people look more intelligent, and—when worn upside down—enable a dormant wad of gray matter in the brain to control the Hubble Telescope. Unleash your satellite-wielding capacities with today's Groupon: for $40, you get $200 worth of prescription eyewear at Klauer Optical, with locations in Dubuque and Cedar Rapids.

Drawing on more than 71 years of eye-care experience, Klauer Optical’s staff sharpens blurry vision by fitting designer frames and lenses over clouded orbs. Glass, plastic, polycarbonate, and Tec-Lite lenses ($99+) correct focus and protect against blinks during presidential staring contests. Hundreds of stylish frames ($80+), culled from fashion hotbeds such as New York and Los Angeles, fill Klauer Optical's twinkling show room. Designer prescription sunglasses provide ultraviolet protection from the sun’s brand-savvy rays, allowing for clearer vision on sunny days and better birding on the summer solstice.