PRK surgery is a type of refractive surgery used to correct vision problems such as myopia, hyperopia, and astigmatism. It involves the use of a laser to reshape the cornea, which is the clear outer layer of the eye. This procedure is often recommended for patients who are not good candidates for LASIK surgery. While PRK surgery can be effective in correcting mild to moderate myopia, many people wonder if it can also be used to correct high myopia.
What Is High Myopia?
High myopia, also known as severe nearsightedness, is a condition where a person’s eyeball is longer than usual or their cornea is overly curved. This causes light to focus in front of the retina instead of on it, leading to blurry vision.
High myopia can be caused by both genetic and environmental factors. It tends to run in families, and certain ethnic groups, such as Asians, are more prone to developing it. Spending long hours doing close-up work, such as reading or using a computer, can also increase the risk of developing high myopia.
People with high myopia are at a higher risk for certain eye conditions, such as retinal detachment, glaucoma, and myopic macular degeneration. These conditions can lead to vision loss or even blindness if left untreated. Regular eye exams are important for people with high myopia to monitor for any signs of these conditions.
PRK Surgery: An Overview
PRK (photorefractive keratectomy) is a type of laser eye surgery that can correct refractive errors. PRK was the first laser eye surgery technique to be approved by the FDA, and it has been performed for over 30 years.
During PRK surgery, the surgeon removes the outer layer of the cornea, called the epithelium. Then, the surgeon uses a laser to reshape the cornea to correct the refractive error. The epithelium will regenerate on its own within a few days after surgery.
PRK is different from LASIK surgery, which creates a flap in the cornea to access the underlying tissue. PRK does not involve creating a flap, which can be beneficial for patients with thin corneas or other corneal irregularities.
Can PRK Correct High Myopia?
PRK has been successful in correcting high myopia, but its effectiveness can depend on several factors, including:
- The severity of the condition
- The thickness of the cornea
- The presence of certain health conditions, such as uncontrolled diabetes, collagen-vascular diseases, and keloids
PRK may not be suitable for patients with very high degrees of myopia, as it may not be possible to remove enough tissue to correct the vision. Patients with thin corneas may also not be good candidates for PRK, as the surgery can weaken the cornea and increase the risk of complications. Finally, patients with certain health conditions may not be good candidates for PRK, as the cornea may not heal as quickly, which can affect the final outcome of the surgery.
Potential Risks and Complications of PRK for High Myopia
Like any surgery, PRK can have potential risks and complications. These can include:
- Dry eyes
- Glare
- Halos
- Infection
Patients with high myopia may be at a higher risk for certain complications, as the surgery involves removing more tissue from the cornea. However, the risk of complications can be reduced by choosing a skilled surgeon, following pre- and post-operative instructions, and attending follow-up appointments.
What Is the Takeaway?
If you’re dealing with high myopia, PRK surgery could potentially be an option to help you achieve clear vision. At Pacific Vision Institute, one of our skilled ophthalmologists will be happy to sit down with you and help you determine if PRK is a viable solution to your eyesight issues. Contact our office today if you’d like to schedule your initial consultation.