What Is Myopia?
Myopia is a type of refractive error in which the axial length of the eyeball is too long, or the corneal curvature is too steep, causing incoming light rays to focus in front of the retina instead of directly on it. This leads to blurred distance vision.
Myopia has become extremely common worldwide, particularly in Asia, where prevalence is high among young people, and cases of high myopia (over -5.00 diopters) are steadily increasing.
While glasses and contact lenses are the traditional correction methods, many people seek more long-term and convenient solutions due to factors such as inconvenience during sports, cosmetic concerns, discomfort, or occupational needs. This is where laser vision correction surgery plays an important role.
What Is TransPRK?
TransPRK (Transepithelial Photorefractive Keratectomy) is one of the more advanced laser vision correction techniques, developed as an evolution of traditional PRK (Photorefractive Keratectomy).
Unlike LASIK(Laser-Assisted In Situ Keratomileusis) or SMILE(Small Incision Lenticule Extraction), TransPRK is a surface-based laser procedure that does not require creating a corneal flap. Instead, in a single-step process, the excimer laser removes the epithelium (the thin surface layer of the cornea) and reshapes the underlying corneal stroma to correct myopia, hyperopia, or astigmatism.
Because it involves no blade, no flap, and no physical contact, TransPRK is often referred to as a “flap-free, touch-free” laser procedure.
Who Is a Suitable Candidate?
TransPRK is especially suitable for:
• Patients with thin corneas who are not candidates for LASIK.
• Individuals with dry eye syndrome (nerve recovery is faster compared with flap-based procedures).
• Athletes or those at risk of eye trauma (no flap to dislodge after surgery).
• Military or law enforcement personnel engaged in high-intensity activities.
• Patients seeking to minimize structural damage to the cornea.
Candidates must be evaluated by an ophthalmologist to confirm stable vision, normal corneal shape, and no active eye disease.
Surgical Procedure Overview
1. Preoperative evaluation – Comprehensive tests such as corneal thickness measurement, corneal topography, tear film analysis, pupil size, and retinal examination ensure patient eligibility.
2. Surgery – Performed under topical anesthesia. The laser first removes the epithelium, then reshapes the cornea with excimer laser ablation. The procedure takes only seconds.
3. Postoperative care – A bandage contact lens is applied to protect the cornea while the epithelium regenerates (typically within 3–5 days). Antibiotic and anti-inflammatory drops are prescribed, with regular follow-up visits required.
Advantages and Key Features
• No flap-related risks – Avoids complications such as flap displacement or wrinkles seen in LASIK.
• Non-contact, all-laser treatment – Reduces infection risk and surgical variability.
• Tissue preservation – Leaves more corneal tissue intact, making it safer for thin corneas.
• Faster corneal nerve recovery – Less likely to cause long-term dry eye.
• Safe and effective – Provides stable and high-quality vision outcomes.
Conclusion
TransPRK is a safe, flap-free, and blade-free laser vision correction option—particularly suitable for patients with thin corneas, dry eye, or lifestyles that pose a higher risk of eye trauma. Although recovery takes longer compared with LASIK or SMILE, TransPRK offers stable visual outcomes with fewer risks of certain complications.
If you are interested in laser vision correction, consult with your ophthalmologist to determine the most suitable option for your eyes, and take the first step toward a clear, worry-free future.