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目的 评价准分子激光原位角膜磨镶术 (laserinsitukeratomileusis ,LASIK)对近视患者静态近对比敏感度的影响。方法 使用功能性视力对比敏感度 10 1测试表 ,对 4 7例 (93只眼 )接受LASIK治疗的近视患者分别于术前、术后 1个月和 6个月检查空间频率为 1 5、3 0、6 0、12 0及 18 0周 /度 (cycle/degree ,c/d)的静态近对比敏感度 ,并进行统计学分析。结果 LASIK术后 1个月和 6个月裸眼视力接近术前矫正视力。术后 1个月术眼空间频率为 12 0和 18 0c/d的静态近对比敏感度低于术前 ,差异均有非常显著意义 (P <0 0 1) ,术后 6个月趋于恢复。术后 1个月术前屈光度数≥ - 6 0 0D者和术后出现眩光和光晕现象者空间频率为 6 0、12 0及 18 0c/d的对比敏感度下降率分别大于屈光度数 <- 6 0 0D者和术后无眩光和光晕现象者 (P <0 0 5 )。结论 对比敏感度检查可敏感、全面地反映患者的视功能状态 ,利于临床对视觉问题进行及时、有效的诊断 ,弥补临床仅依据视力评价LASIK疗效的不足
Objective To evaluate the effect of laser insitu keratomileusis (LASIK) on near-static contrast sensitivity in patients with myopia. Methods Using the functional visual acuity contrast sensitivity 10 1 test table, 47 cases (93 eyes) of myopic patients undergoing LASIK treatment were examined at preoperative, postoperative 1 month and 6 months spatial frequency of 15,3 0,6 0,12 0, and 18 0 cycle / degree (c / d), and statistical analysis was performed. Results One month and 6 months after LASIK, the uncorrected visual acuity was close to the corrected visual acuity. At 1 month after surgery, the static near-field contrast sensitivity was lower at 12 0 and 18 0c / d than before surgery (P <0.01), and recovered at 6 months . The decreasing rate of contrast sensitivity at 6 0,12 0 and 18 0c / d was greater than that of diopters <- 6 at 1 month postoperatively when the preoperative refractive power ≥ - 600D and after operation were both glare and halo. 0 0D and no glare and halo phenomenon (P <0 05). Conclusions Contrast sensitivity test can reflect the status of visual function of the patient sensitively and comprehensively, which is helpful for the timely and effective diagnosis of visual problems in clinical practice, to make up for the lack of efficacy of clinical assessment of LASIK based on visual acuity