优良视力正视眼不同对比度下视力与高阶像差的关系  

Relationship between contrast visual acuity and higher-order wavefront aberration in normal human eyes with excellent eyesight

作　　者：万修华[1,2,3,4] 熊瑛[1,2,3,4] 李婧[1,2,3,4] 李树宁[1,2,3,4] 卿国平[1,2,3,4] 王宁利[1,2,3,4] 余翔[5] 薛丽霞[5] 凌宁[5] 

机构地区：[1]首都医科大学附属北京同仁医院,北京100730 [2]北京同仁眼科中心,北京100730 [3]北京市眼科学与视觉科学重点实验室,北京100730 [4]北京眼科研究所,北京100730 [5]中国科学院光电技术研究所,成都610209

出　　处：《中华眼视光学与视觉科学杂志》2013年第6期343-346,共4页Chinese Journal Of Optometry Ophthalmology And Visual Science

基　　金：基金项目：国家科技部863计划（2006AA0224D2）;国家自然科学基金（60438030）

摘　　要：目的分析优良视力正视眼低、中、高对比度视力与高阶像差的关系。方法描述性研究。选择优良视力正视眼，在流明值为260背景亮度下，测量对比度为100％、25％、10％和5％4种状态下的视力：同时采集瞳孔直径为3．11mm和5．96mm眼高阶像差。分析3．11、5．96mm瞳孔直径眼高阶像差与不同对比度视力之间的相关性。采用线性回归分析，拟合出回归方程。结果低对比度状态下视力的个体差异性更大。瞳孔直径为3．11mm时，高阶像差均方根值（RMS）与不同对比度视力之间存在着线性相关关系（miniR2=0．1129）。结论高阶像差对于对比度视力的影响特点是全频率。Objective To study the relationship between the higher-order aberrations and low-, medium-, and high-contrast visual acuity in normal human eyes with excellent eyesight. Methods A descriptive study was conducted and normal human eyes with excellent eyesight were selected for this test. With background brightness set at 260 lumens, visual acuities were measured at 4 contrast levels of 100%, 25%, 10% and 5%. At the same time, wavefront aberrations were measured with pupil diameters at 3.11 mm and 5.96 mm. The correlation between contrast visual acuity and wavefront aberration under different pupil sizes was evaluated, and fitted regression equations were determined by using linear regression analysis. Results Visual acuity varied more significantly under low contrast levels than under high contrast. When pupil diameter was set at 3.11 mm, there was a linear correlation between the root mean square value （RMS） of higher-order aberrations and contrast visual acuity （mini coefficient of determination R2=0.1129）. Conclusion Wavefront aberrations impact contrast visual acuity at all contrast levels.

关 键 词：高阶像差 对比度视力 瞳孔直径 

分 类 号：R779.63[医药卫生—眼科]