飞秒激光与角膜板层刀制作角膜瓣的厚度及形态比较

doi:10.3760/cma.j.issn.1674-845X.2013.07.005

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Abstract

Objective To evaluate and compare the thickness and morphology of laser in situ keratomileusis （LASIK） flaps created by either the WaveLight FS-200 femtosecond laser or the Moria microkeratome M2 90 using anterior segment optical coherence tomography （AS-OCT）. Methods This was a prospective case-control study. Bilateral LASIK was performed on 61 myopic patients. Flaps were created using the WaveLight FS-200 femtosecond laser in 72 eyes and the Moria M2 90 microkeratome in 50 eyes. The thickness at 17 points across each flap， 0 mm， ±2 mm， and ±3.5 mm to the corneal vertex on the horizontal， vertical， 45° and 135° meridians， were evaluated using a Visante AS-OCT at 1 week postoperatively. An independent t test was used. Results The central flap thickness of the WaveLight group was 105.53±5.86 µm， while it was 132.96±13.91 µm in the Moria group （t=-13.16， P<0.01）. The difference between the achieved and the intended flap thickness （accuracy） was 6.17±3.98 µm and 23.60±12.64 µm， respectively （t=-15.20， P<0.01）. The standard deviation of thickness in the 17 points within an individual flap （uniformity） was 4.07±0.94 µm in the WaveLight group and 8.48±2.35 µm in the Moria group （t=-12.60， P<0.01）. The index S （Symmetry） of Moria group （33.81±11.28 µm） was significantly smaller in the WaveLight group （68.46±26.66 µm）（t=-8.67， P<0.01）. Conclusion AS-OCT showed that the flaps created with the WaveLight FS-200 femtosecond laser were more accurate， reproducible， and uniform than those created with the Moria M2 90 microkeratome.

Received: 31 January 2013

Corresponding Authors: CHEN Yue-guo

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	ZHANG Yu
	XIA Ying-jie
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Cite this article:

ZHANG Yu,XIA Ying-jie,CHEN Yue-guo. Comparison of corneal flap morphology in laser in situ keratomileusis with the WaveLight femtosecond laser versus the Moria mechanical microkeratome[J]. Chinese Journal of Optometry Ophthalmology and Visual Science, 2013, 15(7): 401-404.

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https://www.cjoovs.com/EN/10.3760/cma.j.issn.1674-845X.2013.07.005 OR https://www.cjoovs.com/EN/Y2013/V15/I7/401

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