Photorefractive Keratectomy (PRK)
Understanding PRK Surgery
Photorefractive keratectomy, commonly known as PRK, is a laser vision correction procedure that can reduce or eliminate your dependence on glasses and contact lenses. As one of the original laser eye surgeries approved by the FDA in 1996, PRK has a long track record of safety and effectiveness for treating nearsightedness, farsightedness, and astigmatism. According to a literature review in the Journal of Refractive Surgery covering 95 studies, 92.6 percent of LASIK patients reported being satisfied with their surgery, and PRK achieves comparable long-term outcomes (Susanna et al., 2025). At Fairfield County Laser Vision, our refractive surgeon uses advanced excimer laser technology to deliver precise, personalized results for patients throughout the greater NY/CT region.
During PRK, the thin outer layer of the cornea, called the epithelium, is gently removed so that an excimer laser can reshape the underlying corneal tissue. Unlike LASIK, PRK does not require creating a corneal flap. Once the laser treatment is complete, the epithelium naturally regenerates over the following several days. A bandage contact lens is placed on the eye to protect the surface and improve comfort during this healing period.
The excimer laser uses a cool ultraviolet light beam to precisely remove microscopic amounts of corneal tissue. Each pulse of the laser reshapes the curvature of the cornea so that light entering the eye focuses more accurately on the retina. For nearsighted patients, the laser flattens the central cornea. For farsighted patients, it steepens the peripheral cornea. Astigmatism is corrected by smoothing an irregularly shaped cornea into a more symmetrical curvature. Modern wavefront-guided laser platforms allow our refractive surgeon to create highly customized treatment plans tailored to each patient's unique corneal shape and optical fingerprint.
How PRK Differs from LASIK
The key distinction between LASIK and PRK is the corneal flap. In LASIK, a thin hinged flap is created on the corneal surface using a femtosecond laser, lifted to expose the underlying tissue, and repositioned after laser treatment. In PRK, no flap is created. Instead, the epithelium is removed entirely, and it regenerates on its own within a few days. This flapless approach eliminates any risk of flap-related complications such as flap dislocation, wrinkling, or epithelial ingrowth that can occasionally occur after LASIK.
LASIK patients typically notice clearer vision within hours of surgery and return to most daily activities the next day. PRK recovery takes longer because the epithelium needs time to grow back and the surface to fully heal. Most PRK patients experience meaningful visual improvement within the first week, with vision continuing to sharpen over the following weeks. Full visual stabilization after PRK generally occurs within one to three months, though some patients notice gradual refinement for up to six months.
PRK is often the preferred choice for patients who are not ideal candidates for LASIK. Because PRK does not require a flap, it preserves more of the cornea's structural integrity, making it well suited for patients with thinner corneas. PRK is also a popular option for athletes, military personnel, and others in physically demanding professions where a corneal flap could be vulnerable to impact. Patients interested in other flapless procedures may also want to explore small incision lenticule extraction, which offers another alternative to traditional LASIK.
Who Is a Good Candidate for PRK
You may be a strong candidate for PRK if you are at least 18 years old with a stable glasses or contact lens prescription for at least one year. Candidates typically have mild to moderate myopia, which is nearsightedness, hyperopia, which is farsightedness, or astigmatism. Patients whose corneas are too thin or have features that make flap creation less advisable often do well with PRK. You should have no active eye diseases, significant dry eye, or uncontrolled autoimmune conditions. Pregnancy and nursing can temporarily change your prescription, so we recommend waiting until hormonal changes have stabilized before considering any laser vision correction procedure.
Our refractive surgeon may recommend PRK over LASIK in several specific situations. Patients with naturally thin corneas or mild corneal surface irregularities often benefit from the additional tissue preservation that PRK provides. Those with certain corneal dystrophies, such as anterior basement membrane dystrophy, may also be better candidates for a surface-based procedure. Additionally, patients who participate in contact sports or have a profession that involves a higher risk of eye trauma often prefer the structural resilience that PRK provides.
PRK may not be appropriate for everyone. Patients with very high refractive errors may achieve better outcomes with alternative procedures such as an implantable collamer lens, which corrects vision by placing a lens inside the eye rather than reshaping the cornea. Patients over 50 who are also developing early lens changes may benefit more from refractive lens exchange, which addresses both the refractive error and the aging natural lens. A thorough preoperative evaluation will help determine the best path forward for your eyes.
How PRK Surgery Is Performed
PRK is an outpatient procedure that typically takes between five and fifteen minutes for both eyes, and you remain awake throughout. On the day of your surgery, you should arrive with clean skin free of any lotions, perfumes, or makeup around the eyes. Our team will review your treatment plan and answer any remaining questions. Numbing eye drops are applied so you will not feel pain during the procedure. A gentle eyelid holder keeps your eye comfortably open to prevent blinking.
Your surgeon begins by carefully removing the epithelium from the corneal surface. This can be done using a dilute alcohol solution, a specialized brush, or the laser itself. Once the epithelium is cleared, you are asked to look at a small fixation light while the excimer laser precisely reshapes the corneal tissue. The laser portion of the procedure typically lasts less than a minute per eye. Advanced eye-tracking technology follows any small eye movements in real time, ensuring the laser stays perfectly centered throughout treatment.
After the laser treatment is complete, your surgeon places a bandage contact lens on the eye to protect the healing surface and reduce discomfort. You will be given a regimen of medicated eye drops, including antibiotic drops to prevent infection and anti-inflammatory drops to support healing. Most patients experience some tearing, light sensitivity, and mild to moderate discomfort for the first two to three days. During this period, avoid rubbing your eyes, swimming, and wearing eye makeup. Plan to have someone drive you home after the procedure, as your vision will be blurry immediately afterward.
Frequently Asked Questions
The bandage contact lens is typically removed at your follow-up visit around four to five days after surgery, once the epithelium has healed over. Most patients notice functional vision improvement within the first week, with about 70 percent of healing occurring during that time. Vision continues to sharpen gradually, and most patients reach their best corrected vision within one to three months. Our team schedules several follow-up appointments during the first year to monitor your progress. For detailed guidance on managing each phase, see our PRK recovery guide.
PRK does involve more discomfort than LASIK during the first few days of recovery. Because the epithelium is removed and needs to regenerate, patients commonly experience a gritty or burning sensation, along with light sensitivity and tearing. These symptoms are most pronounced during the first 48 to 72 hours and are managed effectively with prescribed medication, lubricating eye drops, and cold compresses. Most patients find the discomfort manageable and report significant relief once the bandage contact lens is removed.
The long-term visual outcomes of PRK and LASIK are comparable. The majority of PRK patients achieve 20/20 vision or better, and patient satisfaction rates are very high. Studies consistently show that the vast majority of appropriately selected patients achieve excellent visual acuity. Research with up to 15 years of follow-up confirms that PRK results remain stable over time with low rates of regression. The main difference is the timeline: LASIK delivers rapid visual improvement, while PRK reaches the same endpoint more gradually over several weeks to months.
PRK can effectively treat a range of refractive errors, including moderate levels of nearsightedness, farsightedness, and astigmatism. However, very high prescriptions require removing more corneal tissue, which can increase the risk of complications such as corneal haze or regression. For patients with prescriptions outside the ideal range for PRK, our refractive surgeon may recommend alternatives such as the EVO ICL or refractive lens exchange.
PRK has an excellent safety profile, but all surgical procedures carry some degree of risk. Potential complications include corneal haze, which is a mild clouding of the cornea that can develop during healing and is usually temporary. Other possible side effects include dry eye, glare or halos around lights at night, under-correction or over-correction of the refractive error, and, very rarely, infection. The use of mitomycin-C, a medication applied briefly during surgery, has significantly reduced the incidence of corneal haze in modern PRK procedures.
The best way to determine whether PRK is your ideal procedure is through a comprehensive consultation at Fairfield County Laser Vision. During this evaluation, our team performs detailed measurements of your corneal thickness, curvature, pupil size, tear film quality, and overall eye health. We also discuss your visual goals, lifestyle needs, and medical history. If PRK is not the best fit, we can explore other options tailored to your specific situation, helping you choose the procedure that offers the best balance of safety, effectiveness, and convenience for your life.
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