IOL-Master测量硅油填充眼屈光结果分析

目的评价IOL—Master测量硅油填充眼屈光度数的准确性并分析不同因素与术后屈光误差的关系。方法29例（29眼）硅油填充眼行硅油取出联合人工晶状体（IOL）植入术，术前用IOL—Master进行IOL测量。根据不同病因、硅油放置时间、眼轴、术后并发症等因素进行分类，研究术后视力恢复情况及测量误差产生的原因。结果术后视力较术前均有不同程度的提高，屈光度数的平均预测误差为0．329±0．846（-1．5～-2．0D），眼轴长度（P〉0．05）、病因[裂孔源性（t=0．478，P=0．637）、黄斑裂孔（t=0．135，P=0．895）]、是否近视（t=0．435，P=0．667）与术后产生的屈光误差均无相关性，硅油存留时间〈1年者术后矫正视力恢复好。结论硅油填充眼患者采用硅油取出联合IOL植入术对视力有一定提高，IOL—Master测量硅油填充眼IOL度数是相对准确、安全、方便的方式。

Evaluation of ocular refraction in silicone oil temponade eyes by the IOL-Master system

Background The combination procedure of the removal of silicon oil and cataract extraction+intraocular lens (IOL) implantation is the main method of treating cataract in silicone oil tamponade eye.However,the conventional measuring method of the IOL power is limiting in eyes with silicone oil tamponade.The IOL-Master system is confirmed to be an ideal non-contact optical measuring instrument in vivo.Objective The aim of this study is to measure the preoperative IOL power,evaluate the accuracy of biometry with the IOL-Master system and compare the relationship between different factors and refractive error.Methods IOL power was measured in 29 silicone oil tamponade eyes of 29 patients prior to the silicone oil removal combining IOL implantation with the IOL-Master system according to different factors such as placement time,axis oculi,complications and so on.The reasons of visual acuity recovery and measurement error were discussed.Results Postoperative visual acuity was improved in all of the patients.The average predictive refractive error was 0.329±0.846 (-1.5--2D).Classified factors for the cause of disease for axis oculi included rhegmatogenous retinal detachment (RRD)(t=0.478,P=0.637),macular hole(t=0.135,P=0.895),myopia(t=0.435,P=0.667)and oil-placed time (good for less than 1 year).These factors showed an indirect relationship with errors.Conclusion Silicone oil removal combined with IOL implantation can improve visual acuity.The IOL-Master biometry is accurate,safe and convenient in measuring the IOL power in silicon oil temponade eye,but future research should be performed to decrease the measuring error.