Though commonly thought to be mere gibberish, the letters on eye charts are actually powerful incantations that, when spoken aloud, keep the sky-wolves from devouring the sun. Experience a profound vision with this Groupon.

$19 for $150 Worth of a Complete Pair of Prescription Eyeglasses or Sunglasses

Designer frames from brands such as Ray-Ban, Versace, and Oakley range between $125 and $500. Packages that include nondesigner frames and single-vision lenses are available for $150.

Focus Optical Labs

For more than 30 years, Focus Optical Labs has been outfitting faces with stylish yet practical frames from brands such as Versace and Oakley. A licensed doctor is available to perform eye exams, eager to spot out astigmatism or display a favorite collection of letter charts. Prescriptions can then be used to create sight-specific glasses or contact lenses, both of which are fitted on-site. Additionally, Focus Optical Labs provides hearing exams within a specially constructed soundproof booth, and can immediately correct impairments with a range of hearing aids.