LASIK is a safe, reliable and painless way to improve vision without the need for glasses or contact lenses. The procedure is effective for many patients with nearsightedness (myopia), farsightedness (hyperopia) and astigmatism.
Excessive, insufficient or uneven corneal curvature may be surgically corrected using LASIK, LASEK or other refractive procedures to improve vision and reduce or eliminate the need for eyeglasses or contact lenses.
Photorefractive keratectomy (PRK) is a unique laser vision correction procedure that uses an excimer laser to burn away a small amount (about 5 to 30 percent) of the top of the cornea in order to correct refractive errors. Instead of cutting a flap into the cornea with a blade like the LASIK procedure, this method preserves the strength of the cornea and avoids the risk of perforation and other flap errors commonly associated with the blade method.
During the PRK procedure, the eyes are numbed with anesthetic eye drops, before your doctor uses targeted laser energy to correct the shape of the cornea. The doctor has complete control over the laser throughout the procedure for highly precise, customized results designed to give each patient the best vision for their individual eyes. The entire procedure takes only a few minutes to perform in your doctor's office.
Refractive Lens Exchange
Refractive lens exchange, also called clear lens extraction, replaces the natural lens with a multifocal intraocular lens (IOL) in patients wishing to correct high farsightedness, high nearsightedness or presbyopia without undergoing a corneal modification procedure such as LASIK. Patients can choose from a wide range of IOLs in order to achieve the best possible vision for their individual eyes.
The refractive lens exchange procedure is the same as that used in cataract surgery; the only difference is that refractive lens exchange is performed to achieve refractive correction rather than cataract removal. Refractive lens exchange involves a rapid recovery and offers patients dramatic improvement in vision quality.
After surgery, patients enjoy clearer vision and greater focusing power almost immediately. Most benefit from an eliminated or significantly reduced dependence on glasses or contact lenses, and vision that remains stable over time. This procedure also prevents the patient from developing cataracts in the future.
Over 140 million people in the U.S. wear eyeglasses, and over 30 million wear contact lenses. Glasses and contact lenses improve vision by adjusting the way the eyes bend and focus light. Ideally, light rays are refracted (bent) as they pass through the cornea so that they focus on the retina in the back of the eye. In a healthy eye, this means that objects can be seen clearly. However, many people’s corneas have a shallow or steep curvature which causes light rays to focus in front of or behind the retina. Objects may then appear blurry at certain distances or at all distances.
Glasses and contact lenses correct these refractive errors. Prescriptions are measured for each eye so patients can enjoy optimal vision clarity, usually 20/20. Eyewear may be used for certain activities, such as reading for farsighted (hyperopic) patients and driving or watching television for nearsighted (myopic) patients, or may be worn at all times.
Regular eye exams test for the development and progression of refractive errors and help your optometrist provide a proper prescription if eyeglasses or contact lenses are needed. Exams are also an invaluable tool in the early detection of eye disease.