高度近视LASIK术后白内障患者不同人工晶状体计算公式的比较

目的:探讨高度近视LASIK术后的白内障患者接受Phaco+IOL术时,采用不同三代人工晶状体计算公式的术后屈光效果差异。方法:回顾性收集高度近视LASIK术后白内障患者61例102眼,接受Phaco+IOL术,依据术前使用的人工晶状体计算公式分为三组:Holladay组11例21眼,Haigis-L组30例47眼,SRK-T组20例34眼,比较三组术后3mo时绝对屈光误差值(球镜)的差异。结果:Holladay组绝对术后屈光误差值为0.86±0.41D,Haigis-L组绝对术后屈光误差值为0.43±0.30D,SRKT组绝对术后屈光误差值为1.27±0.58D。Holladay组与SRK-T组间差异没有统计学意义(t=-0.271,P=0.625>0.05),Haigis-L组与Holladay组间差异有统计学意义(t=2.249,P=0.047<0.05),Haigis-L组与SRK-T组差异有统计学意义(t=6.012,P=0.031<0.05)。结论:对于高度近视LASIK术后的白内障患者,人工晶状体度数测量时,Haigis-L公式更合适,其术后屈光结果的准确性优于SRK-T和Holladay公式。

Comparison of the different formulas in intraocular lens power calculations on high myopia after LASIK with cataract patients

AIM: To compare the different formulas in intraocular lens(IOL)power calculations on high myopia after LASIK with cataract patients who received the phacoemulsification and intraocular lens implantation(Phaco+IOL).

METHODS: This was a retrospective study. Data from 102 eyes of 61 cataract patients with high myopia, who received Phaco+IOL after LASIK, were collected. Patients were divided into three groups by formulas in IOL power calculations before surgery: Holladay group(11 cases, 21 eyes), Haigis-L group(30 cases, 47 eyes)and SRK-T group(20 cases, 34 eyes). The ratios of equivalent IOL power after LASIK were predicted and the accuracy of their predictions were compared 3mo after surgery. It was an index of reliability of the formulas outcomes.

RESULTS:The ratios of equivalent IOL power after LASIK using the Holladay, Haigis-L and SRK-T formulas were 0.86±0.41D, 0.43±0.30D and 1.27±0.58D, respectively. There was no significant difference between Holladay group and SRK-T group(t=-0.271, P=0.625>0.05). However, significant difference was found between Haigis-L group and Holladay group(t=2.249, P=0.047<0.05), Haigis-L group and SRK-T group(t=6.012, P=0.031<0.05).

CONCLUSION: The Haigis-L formula is more accurate than the SRK-T and Holladay formulas in predicting IOL power for cataract patients with high myopia after LASIK.