儿童散光度数变化对波前像差的影响

发布时间：2018-10-30 18:47

【摘要】：目的探讨儿童散光度数变化对波前像差的影响,进而评估儿童视觉质量。方法收集就诊于大连医科大学附属第二医院眼科门诊的7~10岁儿童,散瞳3 d,第4天行验光和OPD像差仪检查,选取符合入选标准的顺规散光儿童59例。患者依散光度大小分为低散光度组(1.00 D≤散光度2.00 D)、中散光度组(2.00 D≤散光度3.00 D)、高散光度组(3.00 D≤散光度4.00 D)。通过OPD检查获取波前像差、调制传递函数(modulation transfer function,MTF)和点扩散函数(point spread function,PSF)等光学信息,进而分析全眼的总高阶像差、总彗差、总球差、总三叶草所对应的均方根值(root mean square,RMS)和MTF曲线对应的面积比值(area ratio,AR)及PSF曲线对应的斯特列尔比值(strehl ratio,SR)。我们采用单因素方差分析比较三组间各高阶像差所对应的RMS值、AR值及SR值的差异。结果4 mm瞳孔直径下,总高阶像差的均方根值、总彗差的均方根值及总三叶草的均方根值随着散光度的增加而增大,且三组之间差别均有统计学意义(均为P0.05)。总球差的均方根值随着散光度的增加而增大,但组间差别无统计学意义(P0.05)。MTF曲线的AR值及PSF曲线的SR值都随着散光度增大而减小,且三组之间差别均有统计学意义(均为P0.05)。结论顺规散光儿童散光度的变化对高阶像差、MTF、PSF均有影响,顺规散光的大小主要对高阶像差的不对称成分产生影响。
[Abstract]:Objective to investigate the influence of astigmatism on wavefront aberration and evaluate the visual quality of children. Methods A total of 59 children with conformable astigmatism were selected from the ophthalmological outpatient department of the second affiliated Hospital of Dalian Medical University who were examined by optometry and OPD aberration on the 4th day after 3 days of dilating pupil. Patients were divided into low astigmatism group (1.00D 鈮，

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