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中华临床医师杂志(电子版) ›› 2021, Vol. 15 ›› Issue (11) : 852 -857. doi: 10.3877/cma.j.issn.1674-0785.2021.11.010

临床研究

屈光不正人群角膜上皮分布特征与角膜厚度的相关性研究
李刚1,(), 耿安姝1, 白若濛1, 赵立华1   
  1. 1. 100144 北京,北京大学首钢医院眼科
  • 收稿日期:2021-08-23 出版日期:2021-11-15
  • 通信作者: 李刚
  • 基金资助:
    北京大学首钢医院高层次引进人才科研启动项目(GCCRC202104)

Association of corneal epithelial thickness distribution profile with corneal thickness in ametropia individuals

Gang Li1,(), Anshu Geng1, Ruomeng Bai1, Lihua Zhao1   

  1. 1. Department of Ophthalmology, Peking University Shougang Hospital, Beijing 100144, China
  • Received:2021-08-23 Published:2021-11-15
  • Corresponding author: Gang Li
引用本文:

李刚, 耿安姝, 白若濛, 赵立华. 屈光不正人群角膜上皮分布特征与角膜厚度的相关性研究[J]. 中华临床医师杂志(电子版), 2021, 15(11): 852-857.

Gang Li, Anshu Geng, Ruomeng Bai, Lihua Zhao. Association of corneal epithelial thickness distribution profile with corneal thickness in ametropia individuals[J]. Chinese Journal of Clinicians(Electronic Edition), 2021, 15(11): 852-857.

目的

探讨屈光不正人群角膜上皮分布特征及其与角膜厚度的相关性。

方法

采用横断面研究,收集2020年5月至2021年2月在北京大学首钢医院门诊就诊的屈光不正患者159例(318眼),根据角膜整体厚度分为薄角膜厚度组(角膜厚度<500 μm)60眼、正常厚度角膜组(角膜厚度500~550 μm)171眼和厚角膜厚度组(角膜厚度>550 μm)87眼。采用RTVue傅立叶频域光学相干断层扫描仪(FD-OCT)测量患者角膜中央区(直径2 mm)、旁中央区(直径2~5 mm)、中央周围区(直径5~6 mm)的角膜和上皮厚度并进行相关性分析。

结果

整体人群角膜中央2 mm区上皮厚度为(53.6±3.8)μm,最薄点上皮厚度为(50.4±3.7)μm,下方角膜上皮厚度值大于上方,分别为(54.1±3.6)μm和(51.5±3.8)μm,差异有统计学意义(P<0.05)。正常角膜厚度组角膜2~5 mm区的鼻下(r=0.167,P<0.05)上皮厚度与其对应区域的角膜总厚度呈正相关。厚角膜厚度组角膜中央2 mm区(r=0.232,P<0.05)、2~5 mm区的鼻侧(r=0.255,P<0.05)、鼻下(r=0.216,P<0.05)、下方(r=0.249,P<0.05)、5~6 mm区的鼻侧(r=0.264,P<0.05)、下方(r=0.256,P<0.05)上皮厚度与其对应区域的角膜总厚度呈正相关。薄角膜厚度组2~5 mm区的下方(r=0.267,P<0.05)上皮厚度与其对应区域的角膜总厚度呈正相关。

结论

屈光不正人群角膜上皮分布不均匀,角膜上皮厚度和角膜厚度呈正相关,在进行屈光手术设计及术前筛查中应注意这些特征。

Objective

To investigate the corneal epithelial thickness distribution profile in patients with ametropia and its relationship with corneal thickness.

Methods

In this cross-sectional study, a total of 159 ametropia subjects (318 eyes) were enrolled at Peking University Shougang Hospital from May 2020 to February 2021 and were divided into three groups according to corneal thickness: 60 eyes with a thin cornea (<500 μm), 171 eyes with a normal cornea (500-550 μm), and 87 eyes with a thick cornea (>550 μm). The central (2 mm diameter), para-central (2-5 mm diameter), and peripheral (5-6 mm diameter) corneal thicknesses and epithelial thickness were measured by RTVue Fourier domain optical coherence tomography (FD-OCT), and their correlation was analyzed.

Results

The corneal epithelial thickness in the central 2 mm diameter zone was (53.6±3.8) μm, the minimum epithelial thickness was (50.4±3.7) μm, and the lower part was significantly thicker than the upper part [(54.1±3.6) μm vs (51.5±3.8) μm, P<0.05] in the 318 eyes. There was a positive correlation between the total thickness of the cornea and the thickness of the epithelium in the lower part of the nose of the 2-5 mm area (r=0.167, P<0.05) in the normal thickness group. There was a positive correlation between the total thickness of the cornea and the thickness of the epithelium in the central 2 mm area (r=0.232, P<0.05), the nasal side (r=0.255, P<0.05), the lower part of the nose (r=0.216, P<0.05), and the inferior part (r=0.249, P<0.05) of the 2-5 mm area, and the nasal side (r=0.264, P<0.05) and the inferior part (r=0.256, P<0.05) of the 5-6 mm area in the thick group. There was a positive correlation between the total thickness of the cornea and the thickness of epithelium in the inferior part (r=0.267, P<0.05) of the 2-5 mm area in the thin group.

Conclusion

The thickness of the corneal epithelium is not evenly distributed, and the epithelial thickness and corneal thickness show a positive correlation. This requires a close observation by the surgeons during corneal refractive surgery.

表1 不同角膜厚度的屈光不正患者一般资料比较(
xˉ
±s
图1 屈光不正人群角膜17个区域角膜整体厚度和上皮厚度均值分布图(μm,
xˉ
±s)。图a表示全体屈光不正人群角膜厚度;图b表示薄角膜厚度组角膜厚度;图c表示正常角膜厚度组角膜厚度;图d表示厚角膜厚度组角膜厚度;图e表示全体屈光不正人群角膜上皮厚度;图f表示薄角膜厚度组角膜上皮厚度;图g表示正常角膜厚度组角膜上皮厚度;图h表示厚角膜组角膜上皮厚度
注:T为颞侧;N为鼻侧
图2 屈光不正人群角膜上皮厚度(图a)和角膜厚度(图b)分布趋势图。横坐标中1为中央区,2为上方(2~5 mm),3为鼻上方(2~5 mm),4为鼻侧(2~5 mm),5为鼻下方(2~5 mm),6为下方(2~5 mm),7为颞下方(2~5 mm),8为颞侧(2~5 mm),9为颞上方(2~5 mm),10为上方(5~6 mm),11为鼻上方(5~6 mm),12为鼻侧(5~6 mm),13为鼻下方(5~6 mm),14为下方(5~6 mm),15为颞下方(5~6 mm),16为颞侧(5~6 mm),17为颞上方(5~6 mm)
图3 屈光不正人群角膜上皮厚度差异情况。中心为2 mm中央区,内环为2~5 mm区,外环为5~6 mm区,T为颞侧,N为鼻侧;#表示薄角膜厚度组与总体角膜组、正常角膜厚度组和厚角厚度膜组对应区域的上皮厚度差异有统计学意义(P<0.05);+表示薄角膜厚度组上皮厚度与总体角膜组对应区域的上皮厚度差异有统计学意义(P<0.05);*表示薄角膜厚度组与厚角膜厚度组对应区域的上皮厚度差异有统计学意义(P<0.05)
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