单纯性近视的视网膜对比敏感度研究

Study on retinal contrast sensitivity in pure myopia

目的:评估屈光矫正对单纯性近视患者视网膜对比敏感度测量的影响。方法:单纯性近视眼患者50例(100眼),测量其裸眼视力与最佳矫正视力,再用对比敏感度仪测量裸眼、框架眼镜矫正和角膜接触镜矫正3种状态下不同干涉条纹视力(IVA=0.06、0.1、0.2、0.4、0.6、0.8)的对比敏感度值。用配对的秩和检验方法分析视力表视力与干涉条纹视力的关系;用多个变量的秩和检验分析裸眼、框架眼镜矫正和角膜接触镜矫正下的CS值。结果:裸眼近视患者的视力表视力与干涉条纹视力差异有统计学意义(x2=9.009,P<0.05);框架眼镜矫正后近视患者的视力表视力与干涉条纹视力差异无统计学意义(x2=1.009,P>0.05);裸眼、框架眼镜矫正和角膜接触镜矫正3种状态下测得的对比敏感度值之间均都有显著性差异(P<0.05),且戴角膜接触镜矫正所测得值略高于戴框架眼镜所测得值。结论:近视矫正后所测得的视网膜对比敏感度值更能准确地反映视网膜-大脑系统的视觉功能,如果裸眼进行视网膜对比敏感度值的测量将可能出现假阳性,因此测量视网膜对比敏感度时需要矫正近视。

Objective： To evaluate the influence of the retinal contrast sensitivity test the pure myopia that was corrected.Methods： The naked and corrected vision was got in 100 eyes of 50 myopia patients without other eye diseases.Then retinal CSF（Contrast sensitivity function） was determined by RM-800 CSF testing instrument when 100 eyes were naked eyes,corrected with glasses and corrected with soft contact lenses,The retinal CSF was got in six interference fringe visual acuities（IVA=0.06,0.1,0.2,0.4.0.6,0.8.）.Results： There was statistically significant dif-ference between graphical vision of naked myopia patients and IVA of it（p 〈0.05）.There was no statistically significant difference between graphical vision of corrected myopia patients and IVA of it（p〉 0.05）.There was statistically significant difference between CSF of uncorrected eyes and corrected eyes in myopia（p〈 0.05）,and CSF of eyes with contact lenses was significantly better than eyes corrected with glasses.Conclusion： Retinal CSF can display precisely the function from retina to brain in the corrected eyes,it is possibly false positive if we tested in naked eyes,it is advised that retinal CSF should be tested with corrected myopia.