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目的 应用角膜曲率计与角膜地形图仪研究儿童正视眼角膜表面形态特征。方法 对 60例 ( 1 1 5眼 )正视眼儿童进行角膜曲率计与角膜地形图仪测量 ,并得出角膜不规则指数 (CIM)与角膜表面形状系数 (SF)。结果 两种测量方法在测量角膜曲率、角膜散光等方面差异无显著性 (P >0 0 5) ,在测量散光轴向方面有显著统计学差异 ,但此差异无临床意义。本组儿童正视眼CIM值为 :0 63± 0 1 4 ,SF值为 :0 2 7± 0 0 7。结论 儿童正视眼角膜表面呈托力克光学面 ;角膜曲率计与角膜地形图仪对于中央区角膜曲率测量有很好的一致性 ;儿童正视眼角膜表面具有一定的不规则性(CIM约 0 63 )和非球面特性 (SF约为 0 2 7)。
Objective To study the morphological features of corneal surface in children with orthokeratology by corneal curvature meter and corneal topographer. Methods The corneal curvature and corneal topography were measured in 60 children (115 eyes) with corneal topography, and the corneal irregularity index (CIM) and corneal surface shape coefficient (SF) were obtained. Results There was no significant difference between the two methods in measuring corneal curvature and corneal astigmatism (P> 0.05). There was a significant difference in the axial measurement of astigmatism, but the difference was not clinically significant. The eyes of children with CEM value was: 0 63 ± 0 1 4, SF value: 0 2 7 ± 0 0 7. Conclusions Children face corneal surface with Torec optical surface. Corneal curvature meter and corneal topography instrument have good agreement with central corneal curvature measurement. Children face corneal surface with certain irregularity (CIM: 0 63) And asphericity (SF about 0 2 7).