Comparison of Laser Platform Estimation and Objective Measurement of Maximum Ablation Depth Using Scheimpflug Pachymetry in Myopic Femtosecond Laser In Situ Keratomileusis
| Autor: | Sarah Moran, Alice Grise-Dulac, Jean-Luc Febbraro, Hervé Picard, Laurence Salomon, Damien Gatinel |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty Materials science genetic structures medicine.medical_treatment Corneal Stroma Scheimpflug principle Keratomileusis Laser In Situ Visual Acuity Keratomileusis Refraction Ocular Surgical Flaps law.invention 03 medical and health sciences Young Adult 0302 clinical medicine law Ophthalmology medicine Myopia Humans Postoperative Period Prospective Studies Pentacam hr Objective measurement High myopia Middle Aged Laser Ablation eye diseases Femtosecond 030221 ophthalmology & optometry Female Lasers Excimer sense organs 030217 neurology & neurosurgery Follow-Up Studies |
| Zdroj: | Cornea. 39(3) |
| ISSN: | 1536-4798 |
| Popis: | PURPOSE To compare the preoperative estimation of maximum ablation depth provided by the laser platform with objective measurement using Scheimpflug pachymetry in myopic femtosecond laser-assisted in situ keratomileusis (FS-LASIK). METHODS This is a prospective study carried out at the Rothschild Foundation, Paris, France. In 89 consecutive myopic eyes (45 patients) treated with FS-LASIK, the maximum ablation depth was calculated by measuring the difference between preoperative and 3-month postoperative measurements in central corneal thickness using Scheimpflug pachymetry (Pentacam HR; Oculus Optikgerate, Wetzlar, Germany). These values were compared with the preoperative estimation of the maximum ablation depth provided by the laser platform, without nomogram adjustment. RESULTS We found a strong linear correlation between laser platform estimation of maximum ablation depth and Scheimpflug pachymetry (P < 0.00001). The mean ablation depth measured using Scheimpflug pachymetry was greater than that predicted by the laser platform, with a mean overall difference of 2.15 μm (P < 0.05). Subgroup analysis revealed a difference in ablation depth measurements of 7.1 μm in the high myopia subgroup, which was the only subgroup where the difference remained statistically significant. CONCLUSIONS In myopic FS-LASIK, laser platform estimation of maximum ablation depth correlates well with measurement of maximum ablation depth using Scheimpflug pachymetry and therefore can be used safely. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|