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Corresponding Author

Ahmed Mohamed Abdelaziz

Document Type

Original Article

Abstract

Background: Refractive errors can be corrected surgically, which lessens the need for contacts or glasses. Myopia is one of the most prevalent forms of refractive error.

Aim and objectives: To assess, using the Corvis ST Machine, alterations in the biomechanical characteristics of the cornea following LASIK, FS-LASIK, and PRK procedures.

Patients and methods: This is a prospective study carried out from April 2021 to the end of December 2021 at Clear Vision Laser-Assisted in Situ keratomileusis (LASIK)Medical Center in Cairo, out using the Corvis ST Machine on 45 patients, 90 eyes, and 30 eyes each in the LASIK, Photorefractive keratectomy (PRK), and femtosecond LASIK groups to assess modifications to corneal biomechanical parameters following LASIK, FS-LASIK, and PRK procedures.

Results: The post-PRK SSI showed an insignificant change from the pre-operative measurement. Conversely, LASIK and FS-LASIK induced a significant decrease. So, PRK had the most minor adverse effect on corneal stiffness. Also, there was an insignificant difference between LASIK, PRK, and FS-LASIK regarding the mean SP-A1 change, where SP-A1 decreased significantly after the surgery in the three groups.

Conclusion: LASIK had the highest effect on corneal biomechanics, followed by PRK, then FS-LASIK.

Keywords

keratomileusis LASIK; Femtosecond LASIK; Photo refractive keratectomy

Subject Area

Ophthalmology

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