COVID-19 Information: Vaccine | Testing | Self-assessment | Patient & Visitor Safety | Visitor Policy
Emergency Room Wait Times
Home > Living Well > Health Library > PRK and LASEK for Farsightedness
Photorefractive keratectomy (PRK) and laser epithelial keratomileusis (LASEK) for farsightedness use a laser to reshape the cornea so that light is refocused on the retina. The laser reshapes the cornea accurately without damaging nearby tissues. No surgical cut is needed. Either procedure may be used to correct farsightedness and astigmatism at the same time.
These procedures can be done on an outpatient basis in a surgeon's office or same-day surgery center.
With PRK, surface skin cells of the cornea are removed, and a laser is used to reshape the cornea. The whole procedure, including preparation and surgery, takes about 20 minutes.
With LASEK, the surface layer of the cornea is loosened and pushed to the side. After the laser reshapes the cornea, the surface layer is placed back over the cornea.
PRK and LASEK are sometimes called surface ablation.
You will wear an eye shield, a bandage, or special contact lens for 2 to 3 days after surgery. And your doctor will prescribe eyedrops to reduce inflammation and the risk of infection. You may need to use eyedrops for several months after surgery. Several follow-up visits are needed.
The eye can be quite painful for 2 to 3 days. Your vision will be reduced for several days after surgery, until the surface skin cells heal. Recovering from LASEK surgery may be less painful than from PRK.
PRK and LASEK are procedures done to correct farsightedness in otherwise healthy eyes.
They may not be a good choice for people who have more severe farsightedness (high hyperopia). That's because the results are harder to predict and complications are more likely.
These procedures may not be done while you are pregnant. Pregnancy may interfere with the healing of the cornea.
PRK and LASEK work well to reduce mild to moderate farsightedness. But experts don't know how long the effects will last. In the short term, PRK has proved effective in correcting mild to moderate hyperopia.
The risks associated with PRK, LASEK, and epi-LASIK for nearsightedness and farsightedness are similar.
The most common problem is clouded vision (sometimes also called haze). Some people's eyes have some clouding of the cornea as a result of healing. This clouding may occur within a year after surgery and then clear up. It has been linked with spending a lot of time in the sun. Clouding appears to be more common in people who are very nearsighted. Some doctors may give you eyedrop medicine during or after the surgery to lower the chance of haze.footnote 1
Some doctors may recommend avoiding direct sunlight for a while after your surgery. They may also advise you to take vitamin C and wear sunglasses.
Other complications of these surgeries may include:
You may get treatment again if you end up with nearsightedness caused by undercorrection or regression.
Serious but rare complications may include:
Experts don't yet know about all of the long-term side effects or complications.
Jain S, et al. (2014). Excimer laser photorefractive keratectomy. In M Yanoff, JS Duker, eds., Ophthalmology, 3rd ed., pp. 95–101. Edinburgh: Mosby Elsevier.
Current as of:
August 31, 2020
Author: Healthwise StaffMedical Review: Adam Husney MD - Family MedicineChristopher J. Rudnisky MD, MPH, FRCSC - Ophthalmology
Current as of: August 31, 2020
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Christopher J. Rudnisky MD, MPH, FRCSC - Ophthalmology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Disclaimer: The information contained in this website, and its associated websites, is provided as a benefit to the local community, and the Internet community in general; it does not constitute medical advice. We try to provide quality information, but we make no claims, promises or guarantees about the accuracy, completeness, or adequacy of the information contained in or linked to this website and its associated sites. As medical advice must be tailored to the specific circumstances of each patient and healthcare is constantly changing, nothing provided herein should be used as a substitute for the advice of a competent physician. Furthermore, in providing this service, Adventist HealthCare does not condone or support all of the content covered in this site. As an Adventist health care organization, Adventist HealthCare acts in accordance with the ethical and religious directives for Adventist health care services.
Find an Adventist HealthCare affiliated doctor by calling our FREE physician referral service at 800-642-0101 or by searching our online physician directory.
Set Your Location
Setting your location helps us to show you nearby providers and locations based on your healthcare needs.