Optical and Topographic Changes in Keratoconus After Implantation of Ferrara Intracorneal Ring Segments
| Autor: | Islam Mahmoud Hamdi |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Point spread function medicine.medical_specialty Keratoconus Materials science Adolescent genetic structures Zernike polynomials Corneal Stroma Visual Acuity Refraction Ocular Prosthesis Implantation Young Adult symbols.namesake Ophthalmology Optical transfer function Cornea medicine Humans Prospective Studies Child Optical path length Corneal Topography Prostheses and Implants medicine.disease eye diseases Aberrations of the eye medicine.anatomical_structure Tilt (optics) symbols Optometry Female Surgery sense organs |
| Zdroj: | Journal of Refractive Surgery. 26:871-880 |
| ISSN: | 1081-597X |
| Popis: | Purpose: To assess the morphological, optical, and visual properties of the cornea before and after implantation of Ferrara intracorneal ring segments (ICRS) and compare them to normal values. Methods: Thirty-seven keratoconic eyes were implanted with Ferrara ICRS and compared pre- and postoperatively with 38 non-keratoconic (normal) eyes. Examinations were performed using the NIDEK Optical Path Difference (OPD)-Scan II and analyzed using OPD-Station software. Keratometric data were assessed, in addition to OPD, Zernike coefficients, point spread function (PSF), and modulation transfer function (MTF). Results: Considering correlations, the central 3 mm cornea was found responsible for the low quality vision in keratoconus ( P Conclusions: Ferrara ICRS improve topographic and visual results in keratoconic eyes. |
| Databáze: | OpenAIRE |
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