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wavefront aberration
    Conclusions On the whole,under mesopic state with original pupil size,accommodation can be neglected during the wavefront aberration measurement of the lower order iwht the Asclepion Shack-Hartmann aberrometer.
    结论 应用Asclepion波前像差仪测量眼的低阶像差 ,调节通常可以忽略 ,检查可在原瞳暗视状态下进行而无需药物散瞳。
    With the development of operation,wavefront aberration technology has become hot topic in cornea refractive surgery.
    随着这一手术的开展 ,波前像差成为屈光手术的一个热门话题。
    The basically measurement methods include Shack-Hartmann wavefront sensor,Tscherning aberrometer and Spatially Resolved Refractometer. Applications of wavefront aberration in ophthalmology,its several representative testing methods and respective basic principle were introduced.
    主要介绍波前像差的基础理论以及 3种具有代表性的检测方法 :外向型Shack Hartmann波前检测、视网膜成像型Tscherning波前检测以及入射型空间解像屈光测量 (Scheiner法 )。
    Based on the relationship between the change of the cornea thickness and optical aberrations, a mathematical model for the correction of wavefront aberration is presented.
    基于改变角膜厚度可以改变眼屈光系统波前像差的原理 ,提出了一种矫正眼波前像差的角膜切削模型 .
    Firstly, positions of the ideal reference plane-wave and the wavefront are given. The meaning of wavefront aberration is illustrated using a general mathematical model.
    首先给出理想参考平面波前和实际波前之间的位置关系 ,用一个通用的数学模型表示了波前像差 ;
    Then, basic functions of Zernike are used for describing the aberration structure. The wavefront aberration of an eye is described mathematically as the weighted sum of these Zernike basis functions.
    其次用Zernike多项式系列来描述眼像差结构 ,将波前像差表示成带权重的Zernike多项式系列累加和的形式 ;
    The wavefront aberration of the human′s eye, which was described by Zernike polynomials coefficients,was measured by the subjective Ray-tracing wavefront sensor.
    通过主观式光线追踪波前像差测量方法得到用Zernike系数描述的人眼波前像差;
    Methods The patients whose wavefront aberration were consistent with refraction were divided into 2 groups. The experimental group undergone wavefront aberration-guided LASIK,and the control group received conventional LASIK.
    方法对主觉像差仪检查与术前验光结果一致的患者随机分成2组,实验组以主觉波前像差仪引导LASIK手术,对照组进行传统LASIK手术。
    · AIM: To compare the results of refractive errors in myopia patients measured with wavefront aberration analyzer, autorefraction and phoropter, further to evaluate the accuracy of wavefront aberration analyzer in measuring refractive errors.
    目的:通过波前像差仪与自动验光仪、综合验光仪3种方法测量近视患者屈光状态结果的对比观察,探讨波前像差仪对低阶像差测量的准确性。
    · METHODS: Wavefront aberration analyzer, autorefraction and phoropter were used respectively to measure the refractive errors in 100 eyes of 67 patients with ametropia which were randomly selected. The degrees of myopia, astigmatism and the axis values of astigmatism were recorded and analyzed by statistic software (SPSS).
    方法:随机选取2005-06/2005-09来我院进行LASIK术前检查的近视患者67例100眼,分别应用波前像差仪、自动验光仪、综合验光仪对其球镜度数、柱镜度数、散光轴向测量后进行统计分析、比较。
    · CONCLUSION: The results of both higher and lower order aberration in myopia patients measured with wavefront aberration analyzer are accurate and reliable. ·
    结论:波前像差仪在准确测量眼高阶像差的同时,能够准确地测量近视患者的低阶像差。
    Conclusion Wavefront aberration technique can be used to help us revealing the real reasons of such postoperative visual problems.
    折叠人工晶状体的类型(三片、一片)与术后RMS 3(r=-0.319)、RMS 4(r=-0.475)、RMS 5(r=-0.304)和RMSh(r=-0.408)值呈显著相关性(P均<0.05)。 结论波前像差技术可以帮助揭示术后出现相关视觉问题的原因。
    The aberrometer is an objective instrument which provides wavefront aberration maps and 35 values of zernike functions.
    使用客观型像差仪进行波前像差检测,获得整体像差、各分阶像差的均方根(RMS),及Z7、Z8、Z12项系数和像差图。
    Based on PFWc and AreaMTF metrics,which are objective and quantitative metrics of optical quality of human eyes,the influence of wavefront aberration of single Zernike modes on optical quality is investigated with the W_(RMS) wavefront aberration of 0.05~1.00 μm.
    基于两个人眼光学质量客观评价标准同心相对瞳孔平面(PFWc)和区域调制传递函数(Marea MTF),研究和分析了波前像差均方根值WRMS处于0.05~1.00μm较大范围内泽尼克各项像差对人眼光学质量的影响。
    The overall and highlevel wavefront aberration significantly changed 1days after surgery and returned to preoperative level 7dayslater.
    2.总的波前像差和高阶像差术后1天较术前明显增高,差别有统计学意义,但术后7天,即恢复至术前水平。
    After 1 and 3 months the following investigations were performed:assessment of photopic and mesopic contrast sensitivities,wavefront aberration of the eyes and so on.
    在术后1及3mo检查明视及暗视对比敏感度、眼波前像差等。
 

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