Lü Ya-ping, Xia Wen-tao, Chu Ren-yuan, Zhou Xing-tao, Dai Jin-hui, Zhou Hao
Eye and ENT Hospital Affiliated to Fudan University, Shanghai 200031, China.
Fa Yi Xue Za Zhi. 2011 Apr;27(2):94-7.
To explore the relationship between best corrected visual acuity (BCVA) and refraction parameters in myopia.
Two thousand two hundred and seventy-four patients (4245 eyes) with different degrees of myopia were collected. Their BCVA, diopter of spherical (DS), diopter of cylinder (DC), astigmatism axis, axial length (AL) and corneal thickness were detected. The influence of those parameters on BCVA was studied and the mathematical model of the relationship between BCVA and other parameters including the age and gender of patients was established.
The logistic regression analysis showed that there were correlations between the BCVA (y) and DS (x1), DC (x2), gender (x3), AL (x4), corneal thickness (x5), astigmatism axis (x6) and age (x7) (P<0.05): y=0.580 6-0.034 0 x1-0.046 8 x2+0.056 5 x3+0.016 5 x4+ 0.0007 x5+0.000 2 x6-0.005 8 x7.
For people with myopia, age, gender and corneal thickness have small effect on BCVA, while the DS, DC, AL and astigmatism axis have significant effect on BCVA. The BCVA would decline following the extension of DS, DC and AL. It is helpful to assess the vision of myopia by analyzing the refraction parameters comprehensively.
探讨近视患者最佳矫正视力（BCVA）与屈光参数之间的关系。
收集2274例不同程度近视患者（4245只眼）。检测其BCVA、球镜度数（DS）、柱镜度数（DC）、散光轴、眼轴长度（AL）及角膜厚度。研究这些参数对BCVA的影响，并建立BCVA与包括患者年龄和性别在内的其他参数之间关系的数学模型。
逻辑回归分析显示，BCVA（y）与DS（x1）、DC（x2）、性别（x3）、AL（x4）、角膜厚度（x5）、散光轴（x6）和年龄（x7）之间存在相关性（P<0.05）：y = 0.580 6 - 0.034 0x1 - 0.046 8x2 + 0.056 5x3 + 0.016 5x4 + 0.0007x5 + 0.000 2x6 - 0.005 8x7。
对于近视患者，年龄、性别和角膜厚度对BCVA影响较小，而DS、DC、AL和散光轴对BCVA影响显著。随着DS、DC和AL的增加，BCVA会下降。综合分析屈光参数有助于评估近视患者的视力。
