AIM:To compare the therapeutic effects and complications in the silicon-oil-tamponaded eyes without lens between silicon oil removal with three incisions through pars plana corporis ciliaris combined with secondary posterior chamber intraocular lens(IOL) implantation into capsular bag or ciliary sulcus and silicon oil removal with two incisions combined with secondary posterior chamber IOL implantation by suturing IOL in ciliary sulcus retrospectively·METHODS: Totally 698 cases(713 eyes) from January 2004 to December 2006 and January 2007 to December 2009 in the First Hospital of China Medical University were analyzed retrospectively,they were treated by above-mentioned two kinds of silicon oil removal combined with secondary posterior chamber IOL implantation respectively.Among them,the group of two incisions was 305 cases(314 eyes),the group of three incisions was 393 cases(399 eyes),and the raise of best-corrected visual acuity and the incidence rate of intraoperative and perioperative complication,vitreous rehaemorrhagia,retina redetachment and preretinal membrane were compared·RESULTS:In the group of two incisions,best-corrected visual acuity improved above two lines occurred in 98 eyes(31.2%),corneal endothelium decompensation in 6 eyes(1.9%),intraocular hypotension in 13 eyes(4.1%),intraocular hypertension 11 eyes(3.5%),IOL dyssymmetry seriously in 17 eyes(5.4%),vitreous rehaemorrhagia in 37 eyes(11.8%),retina redetachment 24 eyes(7.6%),preretinal membrane 1 year after operation 45 eyes(14.3%);in the group of three incisions,best-corrected visual acuity improved above two lines occurred in 217 eyes(54.4%),the number of corneal endothelium decompensation and intraocular hypertension was 0,intraocular hypotension in 5 eyes(1.3%),IOL dyssymmetry seriously in 6 eyes(1.6%),vitreous rehaemorrhagia in 9 eyes(2.3%),retina redetachment 7 eyes(1.8%),preretinal membrane 1 year after operation 3 eyes(0.8%),those were significantly different between the two groups·CONCLUSION:Compared with the group of silicon oil removal with two incisions combined with secondary posterior chamber IOL implantation by suturing IOL in ciliary sulcus retrospectively,the group of silicon oil removal with three incisions through pars plana corporis ciliaris combined with secondary posterior chamber IOL implantation into capsular bag or ciliary sulcus have better therapeutic effect,a lower incidence of postoperative complications is suitable for wide application.