角膜塑形术后地形图的傅立叶分析

发布时间：2018-06-30 08:37

本文选题：角膜塑形术 + 角膜地形图　；参考：《安徽医科大学学报》2014年12期

【摘要】：目的运用傅立叶分析地形图观察角膜塑形术对角膜表面光学特性的影响,探索这一定量分析方法是否可以作为术前术后动态评估的有效模式。方法选取38例患者(75眼),平均等效屈光度范围为-0.75~-6.00 D。采用夜戴型角膜塑形镜矫治近视,分别在配戴角膜塑形镜前、戴镜后1个月进行角膜地形图检查,通过Fourier Map模式对Fourier index(傅立叶指数)的0次球面部分(Spherical)、1次非对称性部分(Asymmetry)、2次规则散光部分(Reg.Astig)和3次以上高次非规则散光部分(Higher order)等4种组成部分数据进行对比分析。结果戴镜1个月后,角膜中央3、6 mm范围Spherical的平均值与基线水平相比,差异有统计学意义(t=19.19、18.745,P0.01)角膜中央3、6 mm范围Reg.Astig的平均值与基线水平相比,差异无统计学意义(t=1.909、0.773,P0.05);角膜中央3、6 mm范围Asymmetry的平均值与基线水平相比,差异有统计学意义(t=-6.289、-9.436,P0.01);角膜中央3、6 mm范围Higher order的平均值与基线水平相比,差异有统计学意义(t=-3.248、-4.909,P0.01)。结论傅立叶分析模式反映了角膜塑形术后角膜中央錙3、6 mm区域光学特性的变化,是角膜塑形术有效的定量分析模式。
[Abstract]:Objective to observe the effect of corneal topography on the optical properties of corneal surface by Fourier analysis, and to explore whether this quantitative analysis method can be used as an effective model for dynamic evaluation before and after operation. Methods 38 patients (75 eyes) were selected. The average equivalent diopter range was -0.75 ~ 6.00 D. In the treatment of myopia, corneal topography was examined before wearing corneal plastic lens and one month after wearing it. In this paper, the Fourier Map model is used to compare and analyze the four components of Fourier index (Fourier exponent), I. e., the first order spherical part of Fourier index and the second order regular astigmatism part (Reg.Astig) of Fourier index and the higher order part of higher order above three times. Results one month after wearing the lens, the mean value of spherical in the 3 ~ 6 mm range of the central cornea was significantly different from the baseline level (t19.19 ~ 18.745 / P0.01). The mean value of Reg.Astig in the 3mm range of the central cornea was compared with the baseline level. There was no significant difference between the two groups (P 0.05), the mean value of Asymmetry in the central corneal 3mm range was significantly higher than that in the baseline level (t = 6.289- 9.436, P 0.01), and the mean value of higher order in the central corneal center was significantly higher than that in the baseline (t -3.248- 4.909 / P0.01). The mean value of higher order in the center of cornea was significantly higher than that in the baseline (t = -3.248- 4.909 / P0.01), but there was no significant difference between the two groups (t: 3.248- 4.909 / P0.01). Conclusion the Fourier analysis model reflects the change of optical properties of the 3 ~ 6 mm central corneal area after corneal shaping, and is an effective quantitative analysis model for corneal plastic surgery.
【作者单位】：安徽医科大学附属省立医院眼科;
【基金】：安徽省自然科学基金(编号:1208085QH167)
【分类号】：R779.6

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