激光原位角膜磨镶术后对比敏感度变化的研究  

The change of contrast sensitivity of myopic patients after laser in situ keratomileusis

作　　者：赵保文[1] 胡琦[2] 刘英伟[1] 杨柳[1] 

机构地区：[1]牡丹江医学院附属红旗医院眼科,157000 [2]哈尔滨医科大学第一临床医学院眼科分院

出　　处：《中华眼外伤职业眼病杂志》2011年第2期105-108,共4页Chinese Journal of Ocular Trauma and Occupational Eye Disease

摘　　要：目的探讨准分子激光原位角膜磨镶术（LASIK）术后近对比敏感度的变化。方法对接受LASIK矫治近视的58例（112眼），分别于术前、术后1个月和3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）的对比敏感度，并进行统计学分析。结果LASIK术后1个月和3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6．0、12．0及18．0c／d的对比敏感度均低于术前，差异均有统计学意义（P〈0．01），高度近视组（38眼）术后3个月趋于恢复。超高度近视组（34眼）术后3个月在低空间频率上（1．5及3．Oc／d）的近对比敏感度可恢复至术前水平，但在其它空间频率上（6．0、12．0及18．0c／d）的近方对比敏感度较术前明显下降，差异均有统计学意义（P〈0．01），仍不能恢复至术前水平。结论LASIK术后对比敏感度会出现暂时下降，并随着时间的推移逐渐恢复。超高度近视病例术后对比敏感度恢复较慢。Objective To evaluate the contrast sensitivity function before and after laser in situ keratomileusis （LASIK）. Methods With test chart, contrast sensitivity was measured in randomly selected 58 subjects （ 112 eyes） before, 1 month and 3 months after LASIK. The contrast sensitivity was measured at 1. 5, 3.0, 6.0, 12.0 and 18.0 cycles per degree （e/d） spatial frequency respectively and comparison was made. Results The patients achieved the mean uncorrected visual acuity （UCVA） of 1.07 ± 0. 15 and 1.10± 0.20 at postoperative 1-month and 3-months respectively. Which were close to the correct preoperative visual acuity. There was a general reduction in contrast sensitivity in all spatial frequencies at postoperative 1-month when they were compared with the preoperative contrast sensitivity. The difference at 6.0, 12.0 and 18.0 c/d spatial frequency was statistically significant （P 〈 0.01 ）. By the 3-month visit, all eyes showed a recovery of contrast sensitivity function. Near contrast sensitivity in 6.0,12.0 and 18.0c/d spatial frequency had a decline in superhigb myopia patients at 3-month （ P 〈 0.01 ）. Conclusion Near contrast sensitivity became worse at the early stage after LASIK. It could be recovered later on. But that in super high myopia would take a longer recover time.

关 键 词：准分子激光原位角膜磨镶术 近视 对比敏感度 

分 类 号：R779.63[医药卫生—眼科]