In:
Cornea, Ovid Technologies (Wolters Kluwer Health), Vol. 39, No. 3 ( 2020-03), p. 316-320
Abstract:
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 Optikgeräte, 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.
Type of Medium:
Online Resource
ISSN:
0277-3740
DOI:
10.1097/ICO.0000000000002143
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2020
detail.hit.zdb_id:
2045943-9
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