PRK Surgery Harrisburg Pennsylvania
Reshaping the cornea is called refractive surgery. LASIK can correct for a larger range of myopia than can other refractive surgery procedures such as PRK eye surgery or RK. LASIK also causes less discomfort and has a shorter recovery time than most other refractive surgery procedures.
Epi-LASIK is a laser vision correction technique that combines the advantages of PRK eye surgery and LASIK and eliminates most of their disadvantages.
PRK eye surgery uses alcohol to remove the surface epithelium (the thin layer of skin covering the front surface of the cornea). Then the surface of the eye is treated with the laser. After the procedure, a bandage contact lens is placed in the eye for 4 to 6 days while the epithelium slowly regenerates itself.
Traditional LASEK also uses alcohol to separate the epithelium, but with LASEK the epithelium is pushed aside during the laser treatment then repositioned over the cornea before the bandage contact lens is placed on the eye.
In both PRK eye surgery and LASEK, the use of alcohol kills the epithelial cells and causes mild to severe swelling of the cornea that results in discomfort, light sensitivity and a slower return to functional vision.
The epikeratome laser-assisted keratomileusis procedure, (Epi-LASIK) uses a unique epikeratome to mechanically separate the epithelium to make a flap, similar to a traditional LASIK flap. Unlike LASIK, no sharp blades or knives are required. And unlike LASEK, no alcohol is required.
Advantages of Epi-LASIK
The epikeratome eliminates the need for the alcohol used in PRK and LASEK. Since alcohol is toxic to epithelial cells, removing the alcohol application from the procedure results in faster healing and less pain for patients.
The epikeratome produces a precise, reproducible separation of the epithelium. With Epi-LASIK, many of the flap complications of LASIK are reduced.
Epi-LASIK results in less post-operative haze. The epithelial flap may protect the bare surface of the stroma (the inner tissue of the cornea) after laser treatment and prevent the influx of inflammatory cells from tears.
Because the corneal nerves are not severed as with LASIK, there's a lower risk of extended post-operative dry eye problems.
Epi-LASIK is is often a better option than LASIK for those with thin corneas. With this procedure, approximately thirty-five percent less tissue is removed. That means that many patients who have thin corneas are now candidates for laser vision correction.
Epi-LASIK provides a more predictable outcome for wavefront guided "Custom" laser vision correction. Perhaps because LASIK can induce third order aberrations
The latest technological advance in laser vision correction is “custom” LASIK surgery. Harrisburg patients who receive “Custom” LASIK, which also goes by various other proprietary names, such as CustomVue™, receive ultimate care. Custom LASIK surgery represents the next step in improving the outcome of laser vision correction beyond the excellent results already attainable by conventional means. This is possible because every eye and its associated refractive errors are unique, much like one’s fingerprint, and recent advancements in technology now allow us not only to measure these unique refractive imperfections, but also to accurately and predictably eliminate them.
PRK (Photo-Refractive Keratectomy)
PRK was the first procedure performed using the Excimer laser. It corrects vision by reshaping the cornea. The difference between LASIK and PRK is that with LASIK a corneal flap is created and the laser is applied to the inner tissue of the cornea. With PRK, the epithelium (or outer skin of the cornea) is removed and a laser is applied to the surface of the cornea. PRK can be used to correct low to high levels of nearsightedness, farsightedness, and astigmatism.
- To treat nearsightedness, the steep cornea is made flatter by removing tissue from the center of the cornea. This moves the point of focus from in front of the retina to directly on the retina.
- To treat farsightedness, the flat cornea is made steeper by removing tissue outside of the central optical zone of the cornea. This moves the point of focus from behind the retina to directly on the retina.
To treat astigmatism, the cornea is made more spherical -- like a basketball instead of a football. This eliminates multiple focusing points within the eye and creates one point of focus on the retina. Astigmatism can be treated at the same time as nearsightedness and farsightedness.
PRK is for those who:
- want to reduce or eliminate their dependence on glasses or contacts
- are over 18 years of age
- have had a stable eye prescription for at least one year
- have no health issues affecting their eyes
- have corneas too thin for LASIK
- have large pupils
What to expect on surgery day:
You will arrive at the laser center about an hour prior to your procedure. Once you have been checked in you may be offered a sedative to help you relax. You will then be prepared for surgery. The area around your eyes will be cleaned and a sterile drape may be applied around your eye. Anesthetic eye drops will be used to numb your eyes; no injections or needles will be used. When your eye is completely numb, an eyelid holder will be placed between your eyelids to keep you from blinking during the procedure.
Next, your doctor will remove the epithelium, a thin layer of protective skin that covers the cornea. You will be asked to look directly at a target light while the laser reshapes your cornea. The laser will be programmed with the information gathered in your pre-operative exam. The laser treatment will be completed in less than a minute or two, depending on the amount of correction needed.
Following your procedure, your eye(s) will be examined with a slit lamp microscope. Your eyes may be shielded for protection. Your vision may be blurry or hazy for one to five days. You will experience some discomfort as the epithelium heals and covers the treated area. Eye drops, pain medication and possibly a protective contact lens can be used to minimize this discomfort. Most patients resume normal activities within one to three days. Vision can fluctuate for up to six months.
The decision to have PRK in Harrisburg is an important one that only you can make. The goal of any refractive surgical procedure is to reduce your dependence on corrective lenses. However, we cannot guarantee you will have the results you desire. The vast majority of our patients are extremely happy with their vision after PRK and can do most activities without dependence on corrective lenses.
PRK is a safe, effective and permanent procedure, but like any surgical procedure, it does have some risks. After PRK, almost everyone experiences some visual side effects.These visual side effects are usually mild and temporary and have a tendency to diminish over time. But there is a slight chance that some of these side effects won't go away completely, including light sensitivity, glare, and halos. Serious complications to PRK are extremely rare.
Since everyone heals somewhat differently, some patients may over react to the procedure and some may under react resulting in overcorrections and undercorrections. Once the eye has stabilized (3 to 6 months) you and your doctor can discuss whether a re-treatment could help fine tune your vision if you are over or under corrected.