Background: The purpose of this study was to evaluate the effects of laser-assisted in situ keratomileusis (LASIK) and photorefractive keratectomy (PRK) on corneal biomechanical properties.
Methods: We used the ocular response analyzer to measure corneal hysteresis (CH) and corneal resistance factor (CRF) before and after refractive surgery.
Results: In all, 230 eyes underwent LASIK and 115 eyes underwent PRK without mitomycin C (MMC). Both procedures decreased CH and CRF from baseline. When MMC was used after PRK in 20 eyes, it resulted in lower corneal biomechanical properties at 3 months when compared to the other procedures, but all three procedures had similar values at 12 months.
Conclusion: Significant but similar decreases in corneal biomechanical properties after LASIK, PRK without MMC, and PRK with MMC were noted.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5633312 | PMC |
| http://dx.doi.org/10.2147/OPTH.S142821 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Purpose: To investigate long-term corneal biomechanical changes in thin corneas after small incision lenticule extraction (SMILE).
Methods: Patients with indications for SMILE were enrolled in this study between November 2017 and March 2018. Patients were matched for age, spherical diopter, cylinder, spherical equivalent (SE), and lenticule thickness (LT), and then categorized into the thin cornea group (preoperative thinnest central corneal thickness [CCT] of 500 µm or less, 32 eyes) or normal cornea group (CCT of greater than 500 µm, 32 eyes).
Differentiation Between Pellucid-Like Keratoconus and Pellucid Marginal Degeneration Using Swept-Source Optical Coherence Tomography.
Cornea
November 2024
Department of Ophthalmology, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany.
Purpose: The distinction between pellucid-like keratoconus (PLK) and pellucid marginal corneal degeneration (PMD) based on tomographic examinations is difficult. In this study, corneal tomographic and biomechanical parameters, after classifying PMD and PLK using swept-source optical coherence tomography, were analyzed.
Methods: Diagnoses of PLK and PMD were made using SS-OCT imaging, two groups were formed: PLK (n = 30) and PMD (n = 10).
Inducing cylindrical and spherical defocus after implantation with new generation intraocular lenses improves intermediate and near visual acuity.
Sci Rep
December 2024
Imaging, Biomechanics and Mathematical Modelling Solutions Lab, Narayana Nethralaya Foundation, Bangalore, India.
An induced cylinder and spherical power after implantation with an extended depth of focus (EDOF) and enhanced monofocal intraocular lens (IOL) could improve distance, intermediate (60 cm) and near (40 cm) visual acuity (VA). In this prospective study, forty eyes with Eyhance EDOF IOL (Johnson and Johnson, USA) and 40 eyes with Vivity EDOF IOL (Alcon Laboratories Inc. USA) were included.
View Article and Find Full Text PDFEvidence for spinal disinhibition as a pain-generating mechanism in fibromyalgia syndrome.
Pain Rep
February 2025
Pain Research Institute, Institute of Life Course and Medical Sciences, University of Liverpool, Liverpool, United Kingdom.
Introduction: Pain phenomenology in patients with fibromyalgia syndrome (FMS) shows considerable overlap with neuropathic pain. Altered neural processing leading to symptoms of neuropathic pain can occur at the level of the spinal cord, and 1 potential mechanism is spinal disinhibition. A biomarker of spinal disinhibition is impaired H-reflex rate-dependent depression (HRDD).
View Article and Find Full Text PDFAnalyzing the effect of surgical and corneal parameters on the postoperative refractive outcomes of SMILE in myopic eyes based on machine learning.
Am J Ophthalmol
December 2024
Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, China; School of Medicine, Nankai University, Tianjin, China; Tianjin Eye Hospital, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin Eye Institute, Nankai University Affiliated Ophthalmology Hospital, Tianjin, China; Nankai Eye Institute, Nankai University, Tianjin, China. Electronic address:
Purpose: To analyze the effect of individual parameters on the postoperative refractive outcomes of small incision lenticule extraction in myopic eyes using machine learning methods.
Design: Retrospective Clinical Cohort Study METHODS: We included 477 patients (922 eyes) of small incision lenticule extraction at Tianjin Ophthalmology Hospital and divided the patients into two groups to analyzed the factors affecting postoperative refractive outcomes based on the label of postoperative spherical equivalent (SE) ≤ -0.50D.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!