When stranded in the wilderness, glasses can help you convert sunbeams into fire or look smart as you explain the inedibility of man to a family of grizzly bears. Equip your eyes for the Great Outdoors with today's Groupon: for $30, you get $100 toward a pair of eyeglasses, plus a complimentary second pair (from a select group of frames up to $120 in value), at Sterling Optical.

For more than 90 years, Sterling Optical’s physicians and eyeglass specialists have paired peepers with stylish brand-name frames. Men, women, children, and seeing-impaired mannequins can browse frames by Coach, Michael Kors, Tom Ford, and Kenneth Cole (designer frames are $229+), among others such as Peachtree Eyewear ($119). Eyewear technicians forge lenses in about one hour before bestowing customers with two pairs of custom frames—one for daily wear and one for incognito trips to the grocery store. If within 30 days of their purchase patrons tire of frames with x-ray vision, Sterling Optical will gladly replace said specs with another pair of equal or lesser value.