Children who wear glasses endure wisecracks including “four-eyes” and “Einstein,” while those with perfect vision bask in compliments such as “two-eyes” and “Oppenheimer.” Sharpen your sight with today's Groupon: for $1,999, you get LASIK surgery on both eyes, including pre- and post-operative care, at Espaillat Eye & Laser Institute (a $4,000 value). A free consultation will determine eligibility for the treatment, and ineligible patients will receive a refund on their Groupon.

Dr. Espaillat, who has performed thousands of ocular surgeries and laser treatments, brings his eyeful of expertise to a practice that focuses on custom LASIK and cosmetic laser treatments. Custom, or wavefront, LASIK, is a newer method of vision correction capable of delivering even sharper results than traditional LASIK. After a consultation to determine the patient's candidacy, Dr. Espaillat deploys the wavefront device and a flotilla of tiny Portuguese cartographers to map and draft 3-D images of the entire eye. This modeling guides the 15- to 30-minute procedure, which begins when the doctor opens a small flap in the anesthetized cornea. A specially designed laser then reshapes the central cornea so that light can refract more effectively, treating near- or farsightedness. Once properly reshaped, most corneas deliver improved vision without recourse to contact lenses, glasses, or observant friends.