Department of Ophthalmology, Keio University School of Medicine, Tokyo, Japan.
Graefes Arch Clin Exp Ophthalmol. 2011 Oct;249(10):1519-26. doi: 10.1007/s00417-011-1696-7. Epub 2011 May 12.
To evaluate night vision disturbance and investigate correlations between pre- and post-treatment parameters and glare scores in orthokeratology patients.
Twenty-eight right eyes of 28 patients were enrolled in this study. Corneal topography and a night vision test (NVT) to evaluate the extent of glare were performed after orthokeratology. From the corneal topography, two indices [surface regularity index (SRI) and surface asymmetry index (SAI)] were calculated. Fourier analysis was performed on the topographic data from the central 6 mm, and data were decomposed into asymmetric and higher order components for analysis.
There was no correlation between the glare score and pre-treatment keratometric value, pre-treatment cylinder, post-treatment sphere, and post-treatment cylinder. However, there was a statistically significant correlation between pre-treatment sphere and glare score (Pearson correlation coefficient, r = -0.54, p < 0.01). SRI and SAI significantly correlated with glare score (SRI: r = 0.52, p < 0.01, SAI: r = 0.41, p < 0.05). Higher order and asymmetric components were also significantly correlated with glare score (asymmetry: r = 0.61, p < 0.01, higher order: r = 0.67, p < 0.001).
The glare score was significantly correlated with corneal irregularity, and appeared to be a beneficial parameter for assessment of night vision performance in patients receiving orthokeratology.
评估角膜塑形术后的夜间视力障碍，并探讨治疗前后参数与眩光评分之间的相关性。
本研究纳入 28 例（28 只眼）患者的右眼。在角膜塑形术后进行角膜地形图和夜间视力测试（NVT）以评估眩光程度。从角膜地形图中计算出两个指数[表面规则指数（SRI）和表面不对称指数（SAI）]。对中央 6mm 的地形图数据进行傅里叶分析，并对数据进行分解以进行不对称和高阶成分分析。
眩光评分与治疗前的角膜屈光度、治疗前的散光、治疗后的球镜和治疗后的散光均无相关性。然而，治疗前的球镜与眩光评分之间存在统计学显著相关性（Pearson 相关系数，r=-0.54，p<0.01）。SRI 和 SAI 与眩光评分显著相关（SRI：r=0.52，p<0.01，SAI：r=0.41，p<0.05）。高阶和不对称成分也与眩光评分显著相关（不对称：r=0.61，p<0.01，高阶：r=0.67，p<0.001）。
眩光评分与角膜不规则性显著相关，似乎是评估接受角膜塑形术患者夜间视力表现的有益参数。
