Finite-Element Modeling of Intrastromal Ring Segment Implantation into a Hyperelastic Cornea
نویسندگان
چکیده
منابع مشابه
Finite-element modeling of intrastromal ring segment implantation into a hyperelastic cornea.
PURPOSE Intrastromal corneal-ring segments (ICRSs) are applied to improve highly distorted vision in keratoconic, myopic, and astigmatic patients. Selections of ICRS geometry and position are primarily based on empirical nomograms. We developed a finite-element model (FEM) predicting the corneal response to different ICRS geometries in normal and keratoconic corneas. METHODS A two-dimensional...
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PURPOSE To evaluate the safety and efficacy of intrastromal corneal ring segment implantation using both mechanical and femtosecond-assisted tunnel creation for the treatment of patients with keratoconus. METHODS A retrospective noncomparative interventional study including 96 eyes of 75 patients with keratoconus. All patients had contact lens intolerance and clear central corneas. Corneal tu...
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PURPOSE To evaluate the clinical outcomes of intrastromal corneal ring segment (ICRS) implantation to correct ectasia in eyes with prior refractive surgery. METHODS Forty-one eyes of 25 patients (13 men, 12 women; mean age, 28.66 years) with ectasia after refractive surgery [photorefractive keratectomy (PRK) or laser in situ keratomileusis (LASIK)] were included in a nonrandomized, retrospect...
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Purpose The purpose of this study is to compare the efficacy of intratunnel cross-linking combined with intrastromal corneal ring segment (ICRS) implantation versus combined epithelium-off (epi-off) cross-linking and ICRS implantation for the management of keratoconus. Methods Our study included 20 eyes of 12 patients with moderate-to-severe keratoconus. Group A included 10 eyes that underwen...
متن کاملIndications and visual outcomes of intrastromal corneal ring segment implantation in a large patient series
OBJECTIVES: To describe the indications for and visual outcomes of intrastromal corneal ring segment implantation. METHODS: A large retrospective case-series chart-review study was conducted using Sorocaba Ophthalmological Hospital medical records. This study included 1222 eyes (1196 patients) that were surgically treated between November 2009 and December 2012. The following preoperative dat...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2013
ISSN: 1552-5783
DOI: 10.1167/iovs.12-10852