Decentration And Tilt Of Intraocular Lens After Cataract Surgery: A Clinical Study Based On Preoperative Lens Position

Based on the preoperative lens position, this study explores the related factors associated with the decentration and tilt of the postoperative intraocular lens (IOL) according to the difference of the axial length (AL).

Department of Ophthalmology, West China Hospital, Sichuan University

This was a prospective cohort study. Eyes that underwent uneventful cataract surgery with AL ≥ 22.0 mm, and had at least 3 months of follow-up were included. Eyes were divided into four groups based on the range of the AL as follows: group I: 22-24mm, group II: 24-26mm, group III: 26-28mm, group IV: ≥28mm. The decentration and tilt of crystalline lens (CL) and IOL were obtained from CASIA2.

Two hundred and thirty-nine eyes of one hundred and forty-four patients were examined. The linear regression model showed that in all 4 groups, there was a significant correlation between the preoperative lens decentration and the postoperative IOL decentration respectively (R²=0.084, 0.210, 0.235, 0.169, all p＜0.05), while the correlation between AL and the postoperative IOL decentration was only found significant in group IV (R²=0.174, p＜0.05). There was a significant correlation between the preoperative lens tilt and the postoperative IOL tilt (R²=0.166, 0.262, 0.533, 0.430, all p＜0.05) in all 4 groups, respectively.

Depending on the AL, the preoperative lens position has different degrees of relevance of the postoperative IOL decentration and tilt. Better prediction ability of the preoperative lens position for the postoperative IOL decentration and tilt can be found in the eyes with long AL.