title: Long-term outcomes of intrastromal corneal ring segment implantation for post-LASIK ectasia.
abstract: OBJECTIVE
  To report the long-term results of intrastromal corneal ring segments (ICRS) for postoperative LASIK ectasia.
  
  
  METHODS
  In this retrospective interventional cases series, 8 eyes of 6 patients who underwent femtosecond laser-assisted ICRS implantation for post-LASIK ectasia were enrolled. Main outcome measures were uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spherical equivalent refraction, and average keratometry (Kavg) values were assessed.
  
  
  RESULTS
  Mean±SD follow-up was 67±21 months (range, 36-96 months). The mean UDVA, CDVA, spherical equivalent refraction, and Kavg values were significantly improved at all postoperative visits when compared to baseline values. No serious complications were observed during follow-up.
  
  
  CONCLUSIONS
  Our long-term findings showed that ICRS yielded improvements in visual acuity, refractive status, and keratometric values without any progression in cases with post-LASIK corneal ectasia.
authors.affiliation: Fatih University Medical Faculty Hospital, Department of Ophthalmology, Istanbul, Turkey.
authors.forename: Aydin
authors.initials: A
authors.lastname: Yildirim
authors.affiliation: Turkiye Hospital Eye Clinic, Istanbul, Turkey.
authors.forename: Hanefi
authors.initials: H
authors.lastname: Cakir
authors.affiliation: Department of Ophthalmology, Gaziantep University School of Medicine, Gaziantep, Turkey. Electronic address: dr.necipkara@gmail.com.
authors.forename: Necip
authors.initials: N
authors.lastname: Kara
authors.affiliation: Fatih University Medical Faculty Hospital, Department of Ophthalmology, Istanbul, Turkey.
authors.forename: Hasim
authors.initials: H
authors.lastname: Uslu
mesh_terms: D000328:Adult; D003315:Cornea / Q000473:pathology* / Q000601:surgery*; D004108:Dilatation, Pathologic / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007640:Keratoconus / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy*; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects*; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D019736:Prostheses and Implants; D011474:Prosthesis Design; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: Corneal ectasia; Intrastromal corneal ring segments; LASIK