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. Utter that solar spell with this Groupon.

$59 for an Eye Exam and $175 Toward Prescription Glasses or Sunglasses (Up to $280 Total Value)

Eye exams (a $105 value) hone in on proper prescriptions and check for ocular health before visual specialists fit single-vision plastic lenses into frames from Fundamental ($168) or bebe ($258). Sunglasses include models from Oakley ($110) and Juicy Couture ($119).

Fashion Eye Center

After completing optometry school, Dr. Barry Blonder polished his prescription skills in the Army Medical Corps and at Sears Optical before opening his very own practice, Fashion Eye Center, in 1978. Now with two shop locations, he and his team of optometrists help sharpen patients' vision with contacts and glasses in myriad material and corrective combinations. Their large selection of frames includes basic and designer specs and nonprescription sunglasses great for playing sports, sitting on the beach, or protecting eyes from soap in the shower.

Though Fashion Eye Center sometimes features a discounted price online, this Groupon still offers the best deal available.