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| 正常人眼全角膜点扩散函数的分析 | |
| 引用本文： | 陈妍鹏,郭旭,郭俊红,王芳,仝真真,齐天梅,李毅. 正常人眼全角膜点扩散函数的分析[J]. 国际眼科杂志, 2015, 15(4): 577-583 |
| 作者姓名： | 陈妍鹏 郭旭 郭俊红 王芳 仝真真 齐天梅 李毅 |
| 作者单位： | 075000中国河北省张家口市,河北北方学院附属第一医院眼科;075000中国河北省张家口市,张家口市第二医院骨科;075000中国河北省张家口市,河北北方学院附属第一医院眼科;075000中国河北省张家口市,河北北方学院附属第一医院眼科;075000中国河北省张家口市,河北北方学院附属第一医院眼科;075000中国河北省张家口市,河北北方学院附属第一医院眼科;075000中国河北省张家口市,河北北方学院附属第一医院眼科 |
| 摘 要： | 目的:探讨不同瞳孔直径下正常人眼全角膜总像差的斯特列尔比(strehl ratio,SR)与总高阶像差SR的正常值及其与调制传递函数(modulation transfer function,MTF)的关系。方法:应用SIRIUS 3D角膜地形图仪对200例(400眼)进行全角膜总像差的SR和总高阶像差的SR检查,并分析相对应的均方根值(root-mean-square,RMS)。结果:在不同瞳孔直径组下(3.0,5.0,6.0,7.0mm)全角膜总像差100’SR值为0.45±0.12,0.25±0.06,0.17±0.05,0.13±0.04;总高阶像差100’SR值为0.69±0.14,0.34±0.07,0.24±0.05,0.16±0.04;全角膜总像差200’SR值为0.45±0.12,0.24±0.06,0.20±0.04,0.16±0.03;总高阶像差200’SR值为0.70±0.13,0.35±0.07,0.27±0.06,0.20±0.04,各组均逐渐变小;全角膜总像差SR值和总高阶像差SR值与对应的RMS值之间均存在负相关性。当瞳孔直径小时,总像差SR值与MTF值的高频区相关性较高,而当瞳孔直径大时,总像差SR值与MTF值的低频区相关性较高。结论:正常人全角膜总像差的SR值和总高阶像差的SR值能够很好地反映其视觉质量。 |
| 关 键 词： | 点扩散函数 斯特列尔比 瞳孔直径 均方根值 调制 |
| 收稿时间： | 2014-07-19 |
| 修稿时间： | 2015-01-15 |
Analysis of the point spread function in total corneal of normal population |
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| Yan-Peng Chen,Xu-Guo,Jun-Hong Guo,Fang Wang,Zhen-Zhen Tong,Tian-Mei Qi and Yi Li. Analysis of the point spread function in total corneal of normal population[J]. International Eye Science, 2015, 15(4): 577-583 | |
| Authors: | Yan-Peng Chen Xu-Guo Jun-Hong Guo Fang Wang Zhen-Zhen Tong Tian-Mei Qi Yi Li |
| Affiliation: | Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China;Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China;Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China;Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China;Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China;Department of Ophthalmology, the First Affiliated Hospital of Hebei Northern Institute, Zhangjiakou 075000, Hebei Province, China2Department of Orthopedics, the Second Hospital of Zhangjiakou City, Zhangjiakou 075000, Hebei Province, China |
| Abstract: | AIM:To explore relationship between the normal strehl ratio(SR)values of total aberrations/SR values of total higher-order aberrations and modulation transfer function(MTF)at total corneal at different pupil diameters in normal population. METHODS: To exam the SR values of total aberrations and SR values of total higher-order aberrations of total corneals in 200 people(400 eyes)using SIRIUS 3D topography system and analysis the corresponding root-mean-square(RMS). RESULTS: The subjects with different pupil diameters(3.0, 5.0, 6.0, 7.0mm)'s exam results of total corneal were as following: SR value of total aberrations 100'(0.45±0.12),(0.25±0.06),(0.17±0.05),(0.13±0.04); SR value of total higher order ab cerrations 100'(0.69±0.14),(0.34±0.07),(0.24±0.05),(0.16±0.04); SR value of total aberrations 200'(0.45±0.12),(0.24±0.06),(0.20±0.04),(0.16±0.03); SR value of total higher order aberrations 200'(0.70±0.13),(0.35±0.07),(0.27±0.06),(0.20±0.04). The SR values of each group decreases with the increases of pupil diameters. The SR values of total aberrations and SR values of total higher-order aberrations at total corneals are negatively correlated with corresponding RMS value. When the pupil diameter is small, the SR value of total aberrations is more related to higher frequency region of MTF. When the pupil diameter is big, the SR value of total aberrations is more related to lower frequency region of MTF. CONCLUSION: The visual performance of normal people can be well reflected by SR values of total aberrations and SR values of total higher-order aberrations at total corneal. |
| Keywords: | point spread function strehl ratio pupil diameter root-mean-square modulation transfer function |
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