【摘要】 目的研究近视眼对比敏感度(CS)的不同影响因素。方法随机选取行近视准分子激光的患者62例124眼,矫正视力均≥1.0。分别根据屈光度、年龄和瞳孔大小分组。采用CGT-1000对比敏感度仪分别进行眩光及非眩光状态下的对比敏感度测试。结果在眩光时的对比敏感度均低于无眩光时。眩光状态下,按年龄分组,<40岁组和40～60岁组间对比敏感度的差异无统计学意义(P>0.05),≥60岁组的对比敏感度在各个空间频率点上均明显低于<40岁组和40～60岁组(均P<0.05)。正视组、中低度近视组与高度近视组间的差异均有统计学意义(均P<0.05),但正视组与中低度近视组的差异无统计学意义(P>0.05)。瞳孔>6 mm及≤6 mm两组间的差异无统计学意义(P>0.05)。非眩光状态下按以上方法分组比较,结果与眩光时一致。结论年龄、屈光度明显影响近视眼对比敏感度,而瞳孔大小影响不明显。更多还原

【Abstract】 Objective To investigate the factors impacting contrast sensitivity of human myopia. Methods Sixty two patients(124 eyes) were included in this study,and divided according to power of refraction(emmetropia,low or moderate myopia and high myopia),age and pupil size.The contrast sensitivity was detected with contrast glaretester(CGT-1000) under glare and no glare conditions.Results The contrast sensitivity was lower under glare conditions than under no glare conditions in each group. Difference in contrast sensitivity was not obvious between < 40 years old group and 40 ~ 60 years old group(P >0.05 ),but statistically significant when the two groups were compared with≥60 years old group,which demonstrated low contrast sensitivity at all spatial frequency(all P <0.05).High myopia group showed lower contrast sensitivity than that in the emmetropia group and mild,moderate group(P< 0.05),but there was no statistical difference in that between the emmetropia group,mild and moderate group(P >0.05).No significant difference was observed between groups divided according pupil size. Conclusion Age and refractory diopter are important factors that influence the contrast sensitivity of human myopia.更多还原