Femtosecond laser creation of donor cornea buttons for Descemet-stripping endothelial keratoplasty
| Autor: | Roger W. Beuerman, Yong-Ming Por, Rania Shilbayeh, Howard Cajucom-Uy, Donald T.H. Tan, Jodhbir S. Mehta |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
genetic structures medicine.medical_treatment Corneal Stroma law.invention Corneal Transplantation Optics Optical coherence tomography law Cornea medicine Humans Donor cornea Descemet Membrane Laser ablation medicine.diagnostic_test business.industry Endothelium Corneal Ablation Laser eye diseases Sensory Systems Tissue Donors Ophthalmology medicine.anatomical_structure Descemet Stripping Endothelial Keratoplasty Femtosecond Surgery sense organs Laser Therapy business Biomedical engineering |
| Zdroj: | Journal of cataract and refractive surgery. 34(11) |
| ISSN: | 0886-3350 |
| Popis: | 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 μm 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 μm. 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 ( r 2 = 0.935, P = .001). Conclusion The femtosecond laser produced posterior stromal ablations that were accurate in depth of ablation and circularity. |
| Databáze: | OpenAIRE |
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