Like hardboiled detectives, prescription lenses clear up blurry mysteries and frequently end up framed. Focus on the facts with today's Groupon: for $40, you get $100 worth of prescription eyeglasses and designer sunglasses at Shouse Optical. Buyers of corrective lenses must supply Shouse Optical with prescription info.

Shouse Optical has been correcting vision with custom prescription lenses set in designer frames for more than 30 years. Ditch flashy x-ray specs for simpler frames ($35+), or upgrade a familiar style to high-fashion frames by Polo, Prada, or the rimless Silhouette. Prescription glasses take form with common single-vision lenses ($65+) as well as bifocals ($90) and progressives ($200) and are generally ready in one day depending on their features. Patrons with eagle eyes can cast aside clear eyewear in favor of designer sunglasses by Gucci and Versace ($60+), which protect eyes on the beach or during lazy strolls across the sun.