The goal of any refractive surgical procedure is to reduce or eliminate the need for glasses or contact lenses. In laser vision correction procedures such as LASIK and PRK; a cool beam of laser light reshapes the surface of the cornea. The cornea is the clear 'window' in front of your pupil. Reshaping this surface allows images that enter the eye to focus properly on the retina. LASIK and PRK are both FDA approved!
LASIK (Laser-Assisted In-Situ Keratomelusis) is a refractive procedure designed to reshape the cornea in order to eliminate or reduce a patient's need for corrective lenses such as glasses or contact lenses. In LASIK a thin hinged flap is created in the cornea using an instrument call a microkeratome. The laser procedure is then performed under this flap on the underlayer or stroma of the cornea. The stroma is reshaped using a cool laser beam created by the excimer laser. Reshaping this surface allows light to be more correctly placed onto the retina. The hinged flap is then put back into place over the treated cornea and begins adhering immediately, so, there is no need for stitches.
PRK (Photorefractive Keratectomy) is designed for the same purpose as LASIK. In PRK the epithelium of the cornea is removed over the area being treated. The epithelium is the outer most layer of the eye's surface. The laser then sculpts the surface of the cornea allowing light to focus correctly on the retina. The patient wears a bandage contact lens to help lessen the discomfort after the procedure as the epithelium grows back. This contact lens is usually removed 2-3 days later.
By middle age the ability to change focus from far to near diminishes greatly. At first, people get tired eyes while reading and must hold the paper out further. Later in life, people need reading glasses. Those who wear glasses to see far may be able to take off glasses to read, but gradually, to see both far and near without taking off glasses a bifocal glass is needed.Dr. Epstein has been performing procedures for freedom from bifocals and readers since 1997. There are several procedures done at the center to reverse symptoms of presbyopia. For people who have cataracts and for certain others, there are lens implants that give vision for both far away and more up close. Also, there are procedures that actually make the muscles that flex the natural lens work better.
After the patient's eyes have become numb due to numbing drops. The surgeon sets up the machine to make a protective flap incision in the outer portion of the cornea of the eye and gently lifts it out of the way.
The cornea is then sculpted into a slightly different shape using a pulsed excimer. (laser)
The surgeon cleanses the area and gently repositions the flap which sticks back into position naturally.
With middle age comes eye trouble. Often for the first time a person who has never before had to wear glasses finds the need to wear glasses to read and perhaps for full time wear. This condition is called presbyopia (from the Greek “presby” =old and “opia” =eyes). Now, the baby boomer generation can take some comfort in that surgical technology has provided a way out of reading glasses and bifocals.
The Center for Corrective Surgery is committed to providing the best and most up to date LASIK technology and because of this we have implemented the wavefront technology or the ability to actually perform customized LASIK, or simply custom LASIK.
Wavefront Technology is the scientific base for Customized LASIK laser vision correction currently being performed today. Wavefront Technology has improved the visual outcomes of patients and provided significant advantages over conventional LASIK.
The VISXÂ® WavePrint™ system is both a diagnostic and treatment approach that allows the doctor to take very precise measurement of the patient's eyes. This is similar to a fingerprint of your vision. Just like a fingerprint no two corneal maps are the same. In the system's diagnostic phase, a device called the WaveScan makes a WavePrint Map, a detailed map of the patient's vision. In the treatment phase, the doctor uses the information from the WavePrint Map to perform the vision correction using the excimer laser.
VISX's FDA clinical study results were remarkable. Among other things:• At one year after the VISX CustomVue procedure;
- 100% of the clinical study participants could pass a driving test without glasses or contacts
- 98% of the clinical study participants could see 20/20 or better without glasses or contacts
- 70% of the clinical study participants could see 20/16 or better without glasses or contacts• Four times as many clinical study participants were very satisfied with their night vision after the VISX CustomVue procedure, compared to their night vision before with glasses or contacts.
The laser we use is the VISX Star S4. It is FDA approved to treat higher degrees of refractive error (very strong glass prescription.) It is possible that you may be able to have a good result with LASIK. The surgeon will take measurements of the thickness of your cornea as well as perform many other tests that will determine if laser surgery is right for you. Because the VISX laser is the most tissue sparing on the market we are able to treat higher degrees of nearsightedness than in the past.
Using a technique called monovision, LASIK may greatly improve your reading vision. In monovision one eye is corrected for reading while the other eye is corrected (if needed) for distance. This would be attempted with contact lenses first to determine whether you would like this option. The second option would be correcting both eyes to see well for distance and using glasses when reading.
The FDA guideline does allow for laser vision correction on patient over the age of 18. However, many people are still in a stage of growth at this age and there is a higher likelihood that your vision will change as well. Therefore, LaserVision will perform LASIK only on patients 21 and older.
Most patients, 95% - 98%, see 20/40 (legal driving vision) or better after the procedure. Many patients, about 85%, see 20/20 or better.
Most LASIK patients will be able to see more clearly the same day as the procedure, however the drops given after surgery will make vision cloudy for the first day. Most LASIK patients see very well the next day after the procedure. You may notice continued improvements over the next several weeks.