ArticleIntrastromal corneal ring segment implantation for ectasia after refractive surgeryTorquetti, Leonardo MD, PhD; Ferrara, Paulo MD, PhD∗ Author Information From a private clinic, Belo Horizonte, Brazil ∗Corresponding author: Paulo Ferrara, MD, PhD, Paulo Ferrara Eye Clinic, Contorno Avenida 4747, Suite 615, Lifecenter, Funcionários, Belo Horizonte MG 30110-031, Brazil. E-mail: [email protected] Submitted: October 16, 2009. Final revision submitted: December 10, 2009. Accepted: December 10, 2009. Additional financial disclosuce: Dr. Ferrara has a financial interest in the Ferrara intrastromal cornea ring. SymbolFirst author:Symbol: No Caption available.Leonardo Torquetti, MD, PhD, Private clinic, Belo Horizonte, Brazil. Journal of Cataract & Refractive Surgery: June 2010 - Volume 36 - Issue 6 - p 986-990 doi: 10.1016/j.jcrs.2009.12.034 Buy Metrics Abstract PURPOSE: To evaluate the clinical outcomes of implantation of Ferrara intrastromal corneal ring segments (ICRS) in patients with corneal ectasia after refractive surgery. SETTING: Private clinic, Belo Horizonte, Brazil. METHODS: Charts of patients with corneal ectasia after refractive surgery were retrospectively reviewed. The following parameters were studied: uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), keratometry, corneal asphericity, and pachymetry. All patients were evaluated by Scheimpflug scanning-slit tomography (Pentacam). RESULTS: Twenty-five eyes (20 patients) with corneal ectasia (20 after laser in situ keratomileusis, 4 after radial keratotomy, 1 after photorefractive keratectomy) were evaluated. Postoperatively, the mean UDVA increased from 20/185 to 20/66 (P = .005) and the mean CDVA, from 20/125 to 20/40 (P = .008). The mean asphericity decreased from −0.95 preoperatively to −0.23 postoperatively (P = .006). The mean pachymetry at the apex of the cornea increased from 457.7 μm ± 48.7 (SD) preoperatively to 466.2 ± 49.8 μm postoperatively (P = .025) and the mean pachymetry at the thinnest point, from 436.3 ± 46.2 μm to 453.9 ± 49.3 μm (P = .000). The mean keratometry decreased from 45.41 ± 5.63 diopters (D) to 42.88 ± 4.44 D, respectively; the decrease was statistically significant (P = .000). CONCLUSION: Intrastromal corneal ring segment implantation significantly improved UDVA and CDVA in patients with corneal ectasia. Financial Disclosure: Dr. Torquetti has no financial or proprietary interest in any material or method mentioned. Additional disclosures are found in the footnotes. © 2010 by Lippincott Williams & Wilkins, Inc.
