PURPOSE: 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). SETTING: 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). CONCLUSION: The femtosecond laser produced posterior stromal ablations that were accurate in depth of ablation and circularity.
PURPOSE: 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). SETTING: 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). CONCLUSION: The femtosecond laser produced posterior stromal ablations that were accurate in depth of ablation and circularity.
Authors: Marco Lombardo; Mark A Terry; Giuseppe Lombardo; David D Boozer; Sebastiano Serrao; Pietro Ducoli Journal: Graefes Arch Clin Exp Ophthalmol Date: 2010-01-29 Impact factor: 3.117
Authors: Ossama Nada; Anca Marian; Nicolas Tran-Khanh; Michael Buschmann; Michel Podtetenev; François Vidal; Santiago Costantino; Isabelle Brunette Journal: PLoS One Date: 2014-06-09 Impact factor: 3.240