近视者最佳矫正视力与屈光参数间的相关性

Relationship between Best Corrected Visual Acuity and Refraction Parameters in Myopia

目的探究近视者最佳矫正视力(best corrected visual acuity,BCVA)与屈光参数等相关指标之间的相关性。方法选取2274例(4245眼)不同程度近视者,检测近视者的BCVA和球镜屈光度(diopter ofspherical,DS)、柱镜屈光度(diopter of cylinder,DC)、柱镜轴位、眼轴长度(axial length,AL)、角膜厚度等屈光参数,分析上述因素对BCVA的影响,并建立了BCVA与上述屈光参数以及年龄、性别等指标的相关性数学模型。结果 logistic回归分析显示BCVA(y)与DS(x1)、DC(x2)、性别(x3)、AL(x4)、角膜厚度(x5)、柱镜轴位(x6)、年龄(x7)之间有相关性(P<0.05):y=0.580 6-0.034 0 x1-0.046 8 x2+0.056 5 x3+0.016 5 x4+0.000 7 x5+0.000 2 x6-0.005 8 x7。结论近视者的年龄、性别和角膜厚度对BCVA存在微弱的影响,DS、DC、AL及柱镜轴位对BCVA有着明显的影响。随着DS和DC的增加,AL的延长,BCVA呈现明显的下降趋势。综合分析屈光参数可以帮助评估近视者的视力状况。

Objective To explore the relationship between best corrected visual acuity（BCVA） and refraction parameters in myopia.Methods Two thousand two hundred and seventy-four patients（4 245 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.Results 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）（P0.05）： y=0.580 6-0.034 0 x1-0.046 8 x2＋0.056 5 x3＋0.016 5 x4＋0.000 7 x5＋0.000 2 x6-0.005 8 x7.Conclusion 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.