AIM: To investigate an ideal correction of intraocular lens(IOL)power for sulcus implantation.

METHODS: Totally 25 patients(25 eyes)who underwent cataract surgery and IOL sulcus implantation due to posterior capsule rupture from August 2007 to December 2010 were reviewed. All patients were divided into three groups according to A-Scan length(AL): <22mm, 22-25mm and >25mm, and the differences between the actual spherical equivalent(SE)refraction in three months postoperation and that predicted by biometry using the SRK-Ⅱ and SRK-T formula were compared.

RESULTS: The mean visual acuity was improved after cataract surgery. The mean visual acuity was 0.49±0.21 in three months postoperation. The predicted SE refraction of IOL in the bag were -0.43±0.34D(AL<22mm), -0.36±0.22D(AL 22-25mm)and -1.16±0.80D(AL>25mm)respectively. The actual SE refraction was -1.25±0.98D(AL<22mm), -1.22±0.82D(AL 22-25mm)and -2.4±1.39D(AL>25mm). There was significant difference(P=0.001)between the predicted and actual SE refraction in the group of AL 22-25mm, and the myopic shift between the predicted and postoperative refraction was 0.8D. There were no significantly differences between another two groups(P=0.148,0.061).

CONCLUSION: In order to correct a myopic shift in the case ofsulcus implantation, the IOL power should be adjusted according to the AL. For patients with AL from 22mm to 25mm, the IOL power should be reduced by 0.8D.