Ferrara intracorneal ring segments for keratoconus
| Autor: | Nórton Souto Severo, Sérgio Kwitko |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Keratoconus
medicine.medical_specialty Visual acuity genetic structures medicine.medical_treatment Eye disease Corneal Stroma Visual Acuity Biocompatible Materials Astigmatism Prosthesis Implantation Postoperative Complications Ophthalmology medicine Humans Polymethyl Methacrylate Intraoperative Complications Dioptre Retrospective Studies medicine.diagnostic_test Intrastromal corneal ring segment business.industry Corneal Topography Prostheses and Implants Corneal topography medicine.disease eye diseases Sensory Systems Private practice Surgery sense organs medicine.symptom Safety business |
| Zdroj: | Journal of cataract and refractive surgery. 30(4) |
| ISSN: | 0886-3350 |
| Popis: | Purpose: To assess the outcome of Ferrara intracorneal ring segments for keratoconus. Setting: Private practice and university hospital, Porto Alegre, Brazil. Methods: In this retrospective noncomparative interventional case series, 51 keratoconus eyes of 47 patients that had Ferrara intracorneal ring segment implantation were reviewed. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), central corneal curvature, corneal astigmatism, surface regularity index, surface asymmetry index, and complications were analyzed. Results: At a mean follow-up of 13.0 months ± 8.7 (SD), the BSCVA improved in 86.4% of eyes, was unchanged in 1.9%, and worsened in 11.7%. The UCVA improved in 86.4% of eyes, was unchanged in 7.8%, and worsened in 5.8%. The mean spherical equivalent (SE) was reduced from −6.08 ± 5.01 diopters (D) to −4.55 ± 5.71 D and the mean refractive astigmatism, from −3.82 ± 2.13 D to −2.16 ± 2.07 D. The mean central corneal curvature was reduced from 48.76 ± 3.97 D to 43.17 ± 4.79 D. Eyes with central keratoconus had statistically significantly better results than eyes with inferior keratoconus in topographic astigmatism, SE, and refraction cylinder. Penetrating keratoplasty was avoided in 38 eyes (74.5%) during the follow-up. Intracorneal ring segment decentration occurred in 2 eyes (3.9%), segment extrusion in 10 eyes (19.6%), bacterial keratitis in 1 eye (1.9%) with segment extrusion, and a disciform keratitis in 1 eye (1.9%). Conclusion: Implantation of Ferrara intracorneal ring segments in patients with keratoconus was a safe and reversible procedure that led to stable results and avoided or delayed PKP in many cases. |
| Databáze: | OpenAIRE |
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