目的：运用双通道技术客观评估散光对低中度近视青年患者视觉质量的影响。

方法：回顾性分析2017-06/09来我院视光中心就诊的低中度近视青年患者258例479眼，按散光度数不同分为4组：-1D<散光度≤0D为L组、-2D<散光度≤-1D为M组，-3D<散光度≤-2D为H组、-4D≤散光度≤-3D为S组。采用基于双通道技术的视觉质量分析系统(OQASTM Ⅱ)检查患者视觉质量，记录并分析MTF cutoff、OSI、SR、OV100%、OV20%、OV9%等参数。

结果：随着散光度数的增加，MTF cutoff、SR、OV100%、OV20%、OV9%值逐渐降低，OSI值逐渐增大。除MTF cutoff和OSI在L组和M组受检者之间差异无统计学意义(P>0.05)，其余参数各组之间差异均有统计学意义(P<0.05)。本组受检者MTF cutoff 、SR与年龄均无明显相关性，与散光度呈负相关； OSI与年龄无明显相关性，与散光度呈正相关。

结论：散光对低中度近视青年患者客观视觉质量有影响，随着散光度的增加视觉质量逐渐下降。

METHODS: Retrospective series of case studies, 258 young myopia patients(479 eyes)were selected and divided into four groups according to the degree of astigmatism: -1D< astigmatism ≤0 for Group L, -2D< astigmatism ≤-1D for Group M, -3D< stigmatism ≤-2D for Group H, -4D≤ astigmatism ≤-3D for Group S. Optical Quality Analysis System(OQASTM II)based on double-pass system was used to examine the patient's optical quality, the following parameters were analyzed: MTF cutoff, OSI, SR, OV100%, OV20%, and OV9%.

RESULTS: As the degree of astigmatism incresaes, MTF cutoff, SR, OV100%, OV20% and OV9% gradually decrease and OSI increases; Except for Group L and the Group M(P>0.05), the difference of MTF cutoff and OSI between the other groups were statistically significant(P<0.05). In this study, there were no significant correlation between MTF cutoff and SR in age, and negative correlation with the degree of astigmatism. OSI had no significant correlation with age and was positively correlated with the degree of astigmatism.

CONCLUSION: The degree of astigmatism has a significant influence on the objective optical quality of low-to-moderate myopia in young people. As the degree of astigmatism increases, the optical quality gradually decreases.