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 $25, you get $100 toward eyewear at Oneway Eyeglasses.

Ocular pros at the independently owned Oneway Eyeglasses fit customers for new specs in 10 minutes. Oneway Eyeglasses fashionably covers eyes with bifocals ($119.95+ for lined; $189.95+ for unlined), single-vision lenses ($79.95+), and multifocals for astigmatic potatoes. An eyeful of brands lets oculus-owners choose exactly how they want to dress their soul-windows, with options including Runway ($79.95+) and Vanni's Spiral V3241 frames ($189.95), which chicly en-rectangle eyes and add dimension with textured striations on the curved arms. Though the cost of this Groupon cannot be used toward exams, Oneway Eyeglasses' optometrist administers eye exams throughout the week and on the weekend, quizzing pupils on historical facts and ensuring that each eye gets the appropriate prescription.