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Comparison of Ziemer FEMTO LDV “Classic” and “Crystal Line” femtosecond laser flap quality by Fourier-domain optical coherence tomography

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Author(s): Jing Zhang | Yue-Hua Zhou | Lei Tian | Chang-Bin Zhai

Journal: International Journal of Ophthalmology
ISSN 2222-3959

Volume: 6;
Issue: 5;
Start page: 611;
Date: 2013;
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Keywords: laser in situ keratomileusis | flap thickness | femtosecond laser | fourier-domain optical coherence tomography

ABSTRACT
AIM: To compare the regularity and accuracy of laser in situ keratomileusis (LASIK) flaps created by the Ziemer FEMTO LDV “Classic” (Ziemer “Classic”) and Ziemer FEMTO LDV Crystal Line femtosecond laser (Ziemer Crystal Line).METHODS:Fourier-domain optical coherence tomography (RTVue OCT) was used tomeasure the morphology of 200 LASIK flaps of 100 consecutive patients created with the Ziemer Classic (100 flaps) or the Ziemer Crystal Line (100 flaps) at one week postoperatively. Flap thickness was evaluated at 36 specified measurement points on each flap. For all procedures with both lasers, the nominal flap thickness was 110µm.RESULTS:The mean flap thickness of the Ziemer Crystal Line group(102.49±2.68µm) was thinner than that of the Ziemer Classic group (107.65±5.09µm) (P
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