摘要目的：分别用Sirius光线追踪法和Haigis－L公式检测近视患者Lasik手术前后等效IOL度数偏差，并探索其与术前近视度数的相关性。方法选取2013年7月至8月在深圳市北京大学深圳医院眼科接受LASIK手术的患者91例，根据近视程度分为三组：I组（13例）：屈光度－1．00～－3．00D；II组（60例）：屈光度－3．25～－6．00D；III组（18例）：屈光度－6．25～－10．625D。应用IOL－Master中Haigis－L公式及Sirius光线追踪法计算LASIK手术前后等效IOL度数偏差，应用SPSS 20．0软件对数据进行统计分析。结果 Haigis－L公式计算结果：LASIK手术前后等效IOL度数偏差在±0．5D范围内的患眼有73例，占80．2％，而偏差在±1．0D范围内为86例，占94．5％，100％患者等效IOL度数偏差均在±1．50D以内；LASIK手术前后等效IOL度数偏差在±0．5D范围内的患者I组13例（100％）、II组51例（85％）、III组9例（50％）。 Sirius光线追踪法计算结果：LASIK手术前后等效IOL度数偏差在±0．5D范围内的患眼有68例，占74．7％，而偏差在±1．0D范围内为81例，占89．0％100％患者等效IOL度数偏差均在±1．50D以内；LASIK手术前后等效IOL度数偏差在±0．5D范围内的患者I组12例（92．3％）、II组48例（80％）、III组8例（44．4％）。结论 Haigis－L公式和Sirius光线追踪法计算LASIK手术前后等效IOL度数偏差均在±1．50D以内，且偏差与术前近视程度关系密切；两种方法均不需要Lasik术前屈光数据。

abstractsObjective The difference of the equivalent IOL powers before and after LASIK was calculated by using the Haigis-L formula and Sirius ray-tracing respectively.And study the correlation be-tween the intraocular lens power and the myopic before laser in situ keratomileusis.Methods Ninety-one patients undergoing myopic laser in situ keratomileusis were enrolled, they were divided into 3 groups ac-cording to myopic diopter, group I (-1.00D~-3.00D) 13cases, group II( -3.25D and -6.00D)60 cases, group III(-6.25D~-10.0D)18 cases.The equivalent IOL power before and after LASIK will be calculated using Haigis-L formula and Sirius ray-tracing.The data were analyzed using SPSS20.0.Results 80.2%of the cases calculated using Haigis-L formula were within ±0.50D of the predicted refraction , 94.5%were within ±1.00D, and 100%within ±1.50D.also, within ±0.50D of the predicted refrac-tion 13cases(100%),51cases(85%),9cases(50%) in group I, II, III respectively.74.7% of the eyes calculated using Sirius ray-tracing were within ±0.50D of the predicted refraction , 89.0%were within ± 1.00D, and 100%within ±1.50D.within ±0.50D of the predicted refraction 12cases(92.3%),48cases (80%),8cases(44.4%) in group I, II, III respectively.Conclusions Sirius ray-tracing and Haigis-L formula can calculate IOL power accurately in eyes with prior myopic LASIK, with no need for preoperative data.and there is positive correlation between the intraocular lens power aberration and the myopic diopter before LASIK.