准分子激光原位角膜磨镶术中不同的微型角膜刀对术后散光的影响  

Effects of the different microkeratome on postoperative astigmatism in LASIK

作　　者：周跃华[1] 李志辉[1] 黄 静[1] 孟玉玲[1] 安伟丽[1] 徐 铮[1] 李 颖[1] 

机构地区：[1]首都医科大学附属北京同仁医院眼科,北京100730

出　　处：《眼科研究》2002年第2期146-149,共4页Chinese Ophthalmic Research

摘　　要：目的 研究准分子激光原位角膜磨镶术（LASIK）中不同的微型角膜刀对术后散光的影响。方法158人（24眼）随机分为H230型微型角膜刀组80人（124眼）和HT230型微型角膜刀组78人（124眼）。所有患者均随访6个月,并对其术前、术后1,3,6个月的散光及其轴的绝对改变和矢量改变进行分析。结果LASIK术后1,3,6个月,散光的绝对值,H230型组分别为0.23D±0.38 D,0.15±0.37D和0.13 D±0.38 D,而 HT230型组分别为0.18D±0.41,0.14 D±0.43D和0.12D±0.42D;散光的矢量值,H230型组分别为0.53D±0.28 D,0.46 D±0.30 D和0.46 D±0.30D,而HT230型组分别为0.46 D±0.33 D,0.50 D ±0.37 D和0.41±0.35D。手术所致散光矢量的改变（包括轴的改变）,除术后3个月时两组间无显著性差异,余均具有显著性差异（术后1个月时,P=0.04;3个月时,P=0.06;6个月时,P=0.02）。结论H230型比HT230型微型角膜刀更易引起较大的散光轴改变,而HT230型比H230型微型角膜刀所致的术后散光改变更趋向于逆规性散光。ve To investigate the effects of different microkeratome on postoperative astigmatism in Laser in Situ Keratomileusis (LASIK). Methods In all 158 patients (248 eyes) ,80 patients (124 eyes) were randomly entered into the microkeratome in Model H 230 group,and another 78 patients (124 eyes) were in Model HT 230 group. The absolute magnitude and axis of astigmatism, and axis and magnitude of vectoral induced astigmatism were analyzed preoperatively and at 1 month, 3 months and 6 months after LASIK. Follow-up was 6 months. Results In the Model H 230 group,the mean change in absolute astigmatism was 0. 23±0. 38 D,0. 15±0. 37 D and 0. 13 ±0. 38 D at 1 month,3 months and 6 months,respectively;In the Model HT 230 group,the mean change in absolute astigmatism was 0. 18±0.41 D,0. 14± 0. 43 D and 0. 12±0. 42 D at 1 month, 3 months and 6 months,respectively. The mean magnitude of vectoral induced astigmatism was 0. 53±0. 28 D,0. 46±0. 30 D and 0. 46±0. 30 D in the Model H 230 group,or 0. 46±0. 33 D,0. 50±0. 37 D and 0. 41±0. 35 D in the Model HT 230 group at 1 month, 3 months and 6 months, respectively. The change of mean induced astigmatism (including the change of axis) was significantly different between the two groups at 1 month and 6 months, but it was no significantly different at 3 months (P = 0. 04 at 1 month,P =0. 06 at 3 months,P =0. 02 at 6 months). Conclusion The microkeratome in Model H230 can induce easily the change in axis of astigmatism, but the microkeratome in Model HT 230 can have the tendency to against-the-rule change.

关 键 词：准分子激光原位角膜磨镶术 微型角膜刀 散光 

分 类 号：R779.63[医药卫生—眼科]