Rouhiainen P, Rouhiainen H, Salonen J T
Department of Ophthalmology, University of Kuopio, Finland.
Acta Ophthalmol Scand. 1996 Aug;74(4):379-83. doi: 10.1111/j.1600-0420.1996.tb00713.x.
The purpose of the present study was to evaluate the relationship of various types of early lens opacities with contrast sensitivity at different spatial frequencies. The Lens Opacities Classification System II and Lensmeter 701 were used in the grading of the lens status. The contrast sensitivity was tested with the Vistech VCTS 6500 distance test with optimal correction of refractive errors. Data from 995 eyes were available for the present study. Contrast sensitivity decreased by increasing lens opacification graded with the Lens Opacities Classification System II and also by increasing Lensmeter 701 reading. When the statistical model was adjusted for age and best corrected visual acuity, nuclear opacities and nuclear colour were not associated with decreased contrast sensitivity, however, there was a weak, but statistically significant correlation between contrast sensitivity reduction and cortical opacities at high spatial frequencies, and between contrast sensitivity and posterior subcapsular opacities at low and medium spatial frequencies.
本研究的目的是评估不同类型的早期晶状体混浊与不同空间频率下对比敏感度之间的关系。使用晶状体混浊分类系统II和焦度计701对晶状体状态进行分级。采用Vistech VCTS 6500远距离测试在最佳矫正屈光不正的情况下检测对比敏感度。本研究有来自995只眼的数据可用。随着晶状体混浊程度根据晶状体混浊分类系统II分级增加以及焦度计701读数增加，对比敏感度降低。当统计模型针对年龄和最佳矫正视力进行调整后，核混浊和核颜色与对比敏感度降低无关，然而，在高空间频率下，对比敏感度降低与皮质混浊之间存在微弱但具有统计学意义的相关性，在低和中等空间频率下，对比敏感度与后囊下混浊之间也存在相关性。
