title: Femtosecond laser creation of donor cornea buttons for Descemet-stripping endothelial keratoplasty.
abstract: OBJECTIVE
  To evaluate the accuracy of the thickness and diameter of corneal disks obtained with the Femtec femtosecond laser (20/10 Perfect Vision) for Descemet-stripping endothelial keratoplasty (DSEK).
  
  
  METHODS
  Singapore National Eye Centre, Singapore.
  
  
  METHODS
  A femtosecond laser was used to create posterior stromal ablations at varying depths, producing donor lenticules 150 to 200 microm thick with diameters of 7.0 to 9.5 mm (n = 40). After stromal ablation, the central corneal thickness was measured by anterior segment optical coherence tomography and the diameters were measured using imaging software.
  
  
  RESULTS
  The mean deviation from the attempted thickness was 15 +/- 14 microm. No correlation was found between the preoperative corneal thickness and the accuracy of the laser ablation (P = .91). No statistically significant differences were found in the accuracy of the laser ablation with multiple-pass nomograms (P = .15). The laser was accurate in producing circular diameters with an arc length between 7.0 mm and 9.5 mm (r2 = 0.935, P = .001).
  
  
  CONCLUSIONS
  The femtosecond laser produced posterior stromal ablations that were accurate in depth of ablation and circularity.
authors.affiliation: Singapore National Eye Centre, Singapore.
authors.forename: Jodhbir S
authors.initials: JS
authors.lastname: Mehta
authors.forename: Rania
authors.initials: R
authors.lastname: Shilbayeh
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Por
authors.forename: Howard
authors.initials: H
authors.lastname: Cajucom-Uy
authors.forename: Roger W
authors.initials: RW
authors.lastname: Beuerman
authors.forename: Donald T
authors.initials: DT
authors.lastname: Tan
mesh_terms: D003319:Corneal Stroma / Q000601:surgery*; D016039:Corneal Transplantation; D003886:Descemet Membrane / Q000601:surgery*; D004728:Endothelium, Corneal / Q000637:transplantation*; D006801:Humans; D053685:Laser Therapy / Q000379:methods*; D014019:Tissue Donors