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changbin zhai, Lei Tian, Yuehua Zhou; Comparison Of The Flaps Made By Femtosecond Laser And Automated Keratome For Thin-flap Lasik. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5787.
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To assess and compare the variations of LASIK flap created by the IntraLase FS60 laser, Moria One Use-Plus SBK and the Moria M2 Single-Use 90µm-head automated microkeratomes.
One hundred and sixty-one eyes of 81consecutive patients were enrolled in this prospective study and divided into three groups depending on the flap creation method: the IntraLase laser group (59 eyes) , Moria One Use-Plus SBK (44 eyes) and the Moria M2 plastic single-use 90µm head microkeratome group (58 eyes). Anterior segment optical coherence tomography was used to account the flap thickness of the 20 specified measurements on the corneas at one month postoperatively. Results were used to analyze the reproducibility, uniformity, regularity and accuracy of the LASIK flaps.
The Intralase flaps and the Moria One Use-Plus SBK groups were more uniform and regular, showing an almost planar configuration, than the meniscus shaped flaps created with the Moria M2 Single-Use 90um head keratome. The mean flap thickness of the IntraLase group was 110.81±2.26µm, while the Moria One Use-Plus SBK and Moria M2 automated groups were 113.04±4.90µm and 119.87±13.64µm respectively. The average thickness values in the central, paracentral and peripheral zones were not significantly different in the Intralase flaps (111.18±3.33µm,111.10±2.85µm and 110.34±3.42µm, respectively: p>0.05 by ANOVA) and Moria One Use-Plus SBK flaps(113.85±8.07µm,111.89±5.17µm and 113.78±4.79µm respectively: p>0.05 by ANOVA)In the Moria M2 Single-Use 90µm head microkeratome group, the central flap thickness was statistically significantly thinner than the peripheral zones with a mean flap thickness of 117.96±13.14µm,117.01±13.43µm and 123.11±13.77µm, respectively (p<0.05 by ANOVA). The Intralase flap and Moria One Use-Plus SBK flap thicknesses were statistically significantly more accurate than the Moria M2 Single-Use 90um head flap thicknesses in the peripheral zone (p<0.05), The IntraLase and Moria One Use-Plus SBK flap thickness was significantly accurate than the M2 Single-Use 90-head Microkeratome flap thickness in the peripheral zone (p<0.05).
The flap created by the IntraLase femtosecond laser and Moria One Use-Plus SBK are more uniform; more regular; more accurate and better reproducibility than by the traditional M2 single use 90µm-head microkeratome. The first two methods can make precise flap for Sub-Bowman Keratomileusis (SBK).
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