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Here, you can find the information that you need to help you make informed choices about health care for your eyes. PRK surgeons are accustomed to having patients ask many questions. An important part of our role as surgeons is to educate you. The procedure is painless because the eye is completely numbed with anesthetic eyedrops. These drops are very effective, so no injections or IVs are needed. After the surgery, discomfort occurs on and off for three or four days.
Surgeons typically prescribe an oral pain reliever for you. At my center, we also give you numbing eyedrops to take home to ensure that you are comfortable. Most patients are pleasantly surprised at how quickly PRK is performed.
Expect an experienced surgeon to complete the procedure in five or six minutes per eye. The epithelium takes three or four days to heal. During this time you will experience discomfort and very blurry vision after PRK. By four or five days after surgery your vision begins to clear up, although it may takes several weeks to a month to become excellent. Visual clarity and crispness after PRK continue to improve for three to six months and then stabilize.
Not everyone gets perfect vision. In this situation I usually recommend an enhancement procedure, which means doing another PRK procedure for the small residual correction. If you do need an enhancement procedure, it is usually done six months after the original surgery. An enhancement procedure can be performed years later if your eyesight changes over time. The results of your PRK do not diminish over time. Once your eyes have stabilized, usually in three to six months, your vision correction is permanent.
Also, vision is a combination of different parts of the eye, not just the cornea. Changes in other parts of the eye, like development of an early cataract, can change your vision. Usually, though, we find that vision stays excellent for many years to decades after PRK. If your vision does change when you are older, an enhancement procedure can usually be done to restore excellent vision without glasses.
By the next morning, most people are seeing well enough to drive during the day without glasses. You should use good judgment, and drive only if you can see well enough to do so safely. That depends. It can also be a good choice for those who have dry eyes, since the flap method sometimes makes dry eye symptoms worse.
PRK may also be a better option for people who are at higher risk of eye injury, such as from sports or certain jobs. Good candidates for laser vision surgery need to meet certain criteria , such as having overall good eye health and a stable lens prescription. For most who develop presbyopia after PRK, wearing reading glasses for close-up tasks is the easiest solution. The doctor will check to make sure you meet all the criteria and then help you decide if PRK is right for you. First, your eye surgeon or another eye care professional will put numbing drops in your eyes.
Your surgeon will then place a speculum over your eyes to keep you from blinking. Some PRK surgeons also use a suction ring to keep the eye still. Next, your surgeon will remove the very top layer of corneal cells the epithelium to access the next corneal layer. While you are focused, the surgeon will use an extremely precise, computer-controlled excimer laser to reshape the cornea.
This laser removes microscopic amounts of tissue to create the exact corneal contours needed to sharpen vision. The whole process usually takes under 10 minutes per eye.
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