title: Femtosecond assisted intrastromal corneal ring (ISCR) implantation for the treatment of corneal ectasia.
abstract: To assess the outcomes of intrastromal corneal ring (ISCR) implantation for the treatment of corneal ectasia.
  
  
  
  Thirty-five consecutive patients with secondary corneal ectasia treated with keraring intrastromal corneal ring segment implantation aided by intralaser femtosecond technique (K-ICRS-FS) were evaluated. Visual acuity (logMAR), refraction and astigmatism vector analysis were measured preoperatively and 3 months postoperatively using vector analysis as described by some authors.
  
  
  
  Visual acuity improved from 0.40 ± 0.20 to 0.25 ± 0.13 logMAR (p=0.0002), with reduction of the spherical equivalent from -5.41 ± 4.78 D to -2.83 ± 3.29 D (P=0.0002). Mean astigmatism reduction was 3.92 ± 2.52 D. K maximum decreased from 51.65 ± 5.83 D preoperatively to 48.58 ± 5.54 D (p=0.001) 3 months after the surgery and K minimum decreased from 45.92 ± 4.64 D to 43.96 ± 5.06 D (p=0.0041). There were no intraoperative or postoperative complications.
  
  
  
  Intrastromal corneal ring implantation with the use of a femtosecond laser was a safe procedure, with low risk of complications and significant improvement on visual acuity and topographic data in this seeting of patients with secondary corneal ectasia.
authors: Hospital de Olhos Paulista, São Paulo (SP), Brazil. tina_coimbra@yahoo.com.br
authors: Cristina Cardoso
authors: CC
authors: Coimbra
authors: Marcos Tonelli
authors: MT
authors: Gomes
authors: Mauro
authors: M
authors: Campos
authors: Edvaldo Soter de
authors: ES
authors: Figueiroa
authors: Eduardo Parente
authors: EP
authors: Barbosa
authors: Myrna Serapião dos
authors: MS
authors: Santos
mesh_terms: D000328:Adult; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007640:Keratoconus / Q000601:surgery*; D008297:Male; D019919:Prosthesis Implantation / Q000379:methods*; D012029:Refraction, Ocular; D012189:Retrospective Studies; D012720:Severity of Illness Index; D016896:Treatment Outcome; D014792:Visual Acuity