比较 Ziemer FEMTO LDV 飞秒激光和 Moria M2 机械角膜刀。

Comparison of the Ziemer FEMTO LDV femtosecond laser and Moria M2 mechanical microkeratome.

机构信息

Opthalmic Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sceinces Key Lab, Beijing, China.

出版信息

J Refract Surg. 2012 Mar;28(3):189-94. doi: 10.3928/1081597X-20120208-01.

DOI:10.3928/1081597X-20120208-01

PMID:22373033

Abstract

PURPOSE

To assess and compare the dimensions of LASIK flaps created by the Ziemer FEMTO LDV "Classic" femtosecond (FS) laser and Moria M2 microkeratome with 110-μm head and -20 blade.

METHODS

Seven hundred twenty eyes from 360 consecutive patients were enrolled in this study and divided into two groups of equal size for flap creation with the Ziemer LDV (FS laser group) and Moria M2 mechanical microkeratome (microkeratome group). Nominal flap thickness was 110 μm for all patients and for both devices. Flap thickness was measured by Fourier-domain optical coherence tomography in 14 specified positions on each flap 1 week after surgery to analyze the regularity, uniformity, and accuracy of the two types of LASIK flaps.

RESULTS

The mean deviation between achieved and attempted flap thickness was smaller in the FS laser group than in the microkeratome group. The flaps in the FS laser group were more regular and uniform, showing an almost planar configuration, whereas flaps in the microkeratome group had a meniscus shape and were significantly thicker near the flap edge. Nasal and temporal flap thickness did not differ significantly in the FS laser group, whereas in the microkeratome group, characteristic differences in temporal versus nasal flap thickness were noticed. Within the 5040 individual measurements of the 360 eyes, deviations of >20 μm were observed in 0.73% of eyes in the FS laser group and 42.4% in the microkeratome group.

CONCLUSIONS

The dimensions of flaps created by the Ziemer LDV femtosecond laser were more uniform and accurate than those created by the Moria M2 microkeratome.

摘要

目的

评估和比较使用 Ziemer FEMTO LDV“Classic”飞秒（FS）激光和 Moria M2 微型角膜刀，以 110-μm 刀头和-20 刀制作的 LASIK 瓣的尺寸。

方法

本研究纳入了 360 例连续患者的 720 只眼，分为两组，每组大小相等，使用 Ziemer LDV（FS 激光组）和 Moria M2 机械微型角膜刀（微型角膜刀组）制作瓣。所有患者和两种设备的名义瓣厚度均为 110μm。术后 1 周，使用傅里叶域光学相干断层扫描（OCT）在每个瓣的 14 个指定位置测量瓣厚度，以分析两种类型的 LASIK 瓣的规则性、均匀性和准确性。

结果

FS 激光组实际瓣厚度与预期瓣厚度的平均偏差小于微型角膜刀组。FS 激光组的瓣更规则、更均匀，呈几乎平面状，而微型角膜刀组的瓣呈新月形，瓣缘附近明显更厚。FS 激光组的鼻侧和颞侧瓣厚度无显著差异，而微型角膜刀组的瓣厚度存在明显的颞侧与鼻侧差异。在 360 只眼中的 5040 个个体测量值中，FS 激光组中有 0.73%的眼偏差超过 20μm，而微型角膜刀组中有 42.4%的眼偏差超过 20μm。