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Influence of lens position as detected by an anterior segment analysis system on postoperative refraction in cataract surgery. | LitMetric
Aim : To predict postoperative intraocular lens (IOL) position using the Sirius anterior segment analysis system and investigate the effect of lens position and IOL type on postoperative refraction.Methods : A total of 97 patients (102 eyes) were enrolled in the final analysis. An anterior segment biometry measurement was performed preoperatively with Sirius and Lenstar. The results of predicted lens position (PLP) and IOL power were automatically calculated by the software used by the instruments. Effective lens position (ELP) was measured manually using Sirius 3mo postoperatively. Pearson's correlation analysis and linear regression analysis were used to determine the correlation of lens position to other parameters.Results : PLP and ELP were positively correlated to axial length (AL; =0.42, <0.0001 and =0.49, <0.0001, respectively). There was a weak correlation between the peLP (ELP-PLP) and the prediction error of spherical refraction (peSR; =0.34, <0.0001). The peLP of Softec HD IOL differed statistically from those of both the TECNIS ZCB00 and Sensor AR40E IOLs. Multiple linear regression was used to obtain the prediction formula: ELP=0.66+0.63×[aqueous depth (AQD)+0.6LT] (=0.61, <0.0001), and a new variable (AQD+0.6 LT) was found to have the strongest correlation with ELP.Conclusion : The Sirius anterior segment analysis system is helpful to predict ELP, which reduces postoperative refraction error.
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