Advantages of combining CXL with T-PRK
The Corneal Collagen Cross-Linking (CXL) with Topography-guided Photo Refractive keratectomy (T-PRK) is a proven treatment, which effectively halts the progression of keratoconus. This advanced laser treatment can only be performed in facilities possessing the Wavelight Allegretto Eye-Q laser platform with TCAT software. Hashmanis Group of Hospitals is among the few centres in Pakistan to possess this technology.
CXL combined with T-PRK will not eliminate all visual impairments caused by keratoconus. The goal is rather to make irregular corneas more regular, strengthen the cornea, and improve the quality of vision. Even if the glasses and contact lenses might still be required to correct vision, results have been shown to significantly improve overall uncorrected and best corrected visual acuity.
How T-PRK differs from standard laser eye technology
Excimer lasers have been used to safely common refractive errors like myopia, hyperopia, and astigmatism for over 20 years. As diagnostic imaging technology has improved, our ability to measure other optical aberrations has allowed us to consider a wider range of factors that contribute to distorted vision.
Using imaging derived from highly sophisticated tomography, topography and wavefront aberrometry equipment; T-PRK ablates and flattens the imperfections of keratoconic corneas, and treats the higher order aberrations, smoothing them out prior to the CXL portion of the treatment. Treating these irregularities helps in reducing the level of distorted vision attributed to keratoconus. Since CXL alone can provide a mild flattening of the cornea, the addition of a specialized laser treatment improves vision and can improve the suitability of corrective lenses that could not be achieved previously.
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