Without glasses, people with bad eyesight could never drive a car or tell the difference between a banana and a disgusting fuzzy banana. Sharpen your senses with this Groupon.

$40 for $125 Toward Prescription Glasses

More than 4,000 frames line each store, including brand-name options from Ray Ban, Guess, Tommy Hilfiger, and Calvin Klein ($125–$250+). Once clients have chosen their frames, optometrists fit them with progressive, digital, or classic lenses. Customers who have bought a full pair of glasses receive a second pair for free, which can use different prescriptions, lenses, and frames.

Optiks International

Blurry vision is not just an annoyance; it’s a health risk. So when the owners of Optiks International saw a chance to vertically integrate their business model—and cut down time between an eye exam and obtaining glasses—they jumped on it. The staff inside their chain of retail stores can now accept prescriptions to be processed at their onsite labs, where technicians can create custom-fitted standard, progressive, and googly-eye lenses in an average of ten days.The labs constantly seek out the latest technologies to improve vision, including digital lenses that decrease peripheral distortion and custom cuttings that alter lenses to accommodate the tilt of chosen frames.

Each store stocks a supply of more than 4,000 frames, including options from designer brands such as Coach, Armani, Ray-Ban, and Oakley. Every store also offers a two-for-one deal for each pair of prescription glasses sold, allowing clients to give a pair of glasses to a family member or pair their purchase with prescription sunglasses to avoid darkening regular specs with a whiteboard marker when leaving the house.