眼科研究 2000年第2期第18卷 临床研究
作者:张泳 廉井财 叶纹 王康孙
单位:200025 上海第二医科大学附属瑞金医院眼科中心
关键词:近视;准分子激光原位角膜磨削术
摘要 目的 评价准分子激光原位角膜磨削术(LASIK)治疗近视2年的疗效。方法 98只眼,近视范围-4.00~-20.5 D,散光≤-5.00 D,用Keracor 116型准分子激光治疗。结果 开始绝大部分呈过矫,渐向近视回退,6个月后基本稳定。术后2年时,>-15.00 D,-10.00~-15.00 D,<-10.00 D 3组的屈光度在±0.5 D之内分别为50%,52%,72%;在±1 D之内分别为63%,66%,81%。最佳矫正视力下降不超过2行。≥-10.00 D组和<-10.00 D组,术后裸眼视力≥0.5分别占77%,91%;≥1.0分别占42%,70%。结论 LASIK治疗近视效果稳定,手术安全,可作为中高度近视的首选术式。
分类号 R 772
Evaluation of laser in situ keratomileusis for myopia at two years after surgery
Zhang Yong,Lian Jingcai,Ye Wen,et al.
Ruijin Eye Institute,Shanghai Ruijin Hospital,Shanghai Second Medical University,Shanghai 200025
Abstract ObjectiveTo evaluate the effectiveness and safety of laser in situ keratomileusis(LASIK) in treating myopia at 2 a after surgery.Methods98 eyes(myopia range from -4.00 D to -20.50 D,average -10.97±3.54 D,astigmatism ≤-5.00 D,average -1.61±1.09 D) were treated with LASIK using Keracor 116 excimer laser.ResultsMost of refraction was overcorrection just after surgery.Refraction shifted towards myopia and became rather stable 6 months after LASIK.At 2 a after LASIK,the predictability,regression and uncorrected visual acuity(UCVA) were reported.In subgroups>-15.00 D:50% of refraction was within ±0.5 D and 63% was within±1 D.The average regression was -2.30±1.61 D;In subgroups -10.00 D~-15.00 D:52%±0.5 D,66%±1 D,average regression -1.87±1.15 D.In subgroups<-10.00 D:72%±0.5 D,81%±1 D,average regression -1.31±0.90 D.There was no significant statistic difference in regression among different groups.The average UCVA were 0.55±0.39,0.77±0.34,0.99±0.35.No BCVA lost more than 2 lines of international standard test chart.In subgroups ≥- 10.00 D:77% of UCVA was≥0.5 and 42% of UCVA ≥1 .0.In subgroups ≤-10.00 D:91%UCVA ≥0.5,70%UCVA ≥1.0.ConclusionLASIK for myopia is saf e and its effect is stable.It may be the first choice of operation for moderate or high myopia.
Key words myopia laser in situ keratomileusis
准分子激光原位角膜磨削术(laser in situ keratomileu sis,LASIK)。保留了角膜上皮及前弹力层,术后反应轻,治疗中、高度近视的效果比较好,是目前较为理想的一种方法。但其长期效果如何,报道较少。本文就其术后2年的稳定性、安全性作一评价。
1 资料与方法
1.1 研究对象
我们收集了1995年12月到1996年6月间在瑞金眼科中心行LASIK治疗近视的病例98只眼,年龄18~50岁,平均29.62岁±9.32岁。近视度数范围为-4.00 D至-20.5 D,平均-10.97 D±3.54 D;散光≤-5.00 D。分为>-15.00 D、-10.00~-15.00 D及<-10.00 D3组。总屈光度数以平均等量球镜值表示。
1.2 术前检查
术前查视力及验光,眼前节及眼底检查,测定眼压(非接触眼压计),行角膜地形图检查及超声角膜厚度的测定。
1.3 手术方法
用Chiron Vision公司(美国)生产的自动角膜成形器,形成一厚160 μm的角膜瓣。准分子激光采用Chiron/Technolas Keracor-116型激光器,波长193 nm,能量密度120 mJ/cm2,激光频率50 Hz,采用多区、大光斑消融角膜基质。其所矫正度数及消融直径预先输入计算机,由计算机控制自动消融。治疗量为球镜值加10%。消融后角膜瓣复位,无需缝合。
术后1天起,0.1%艾氟龙+0.3%氟嗪酸每日4次滴眼,用10天。术后3天,1,3,6,12月,2年复查,进行裂隙灯、眼压、视力、屈光度、角膜地形图、角膜厚度检查。
本文数据经统计学分析采用Student t检验。
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