The goal of the present study was to compare the stability of the 3-piece (TecnisⓇ ZA9003) and single-piece (AcrySofⓇ IQ) aspheric intraocular lenses (IOL) by testing decentration, tilt, anterior chamber depth, and refraction.

The subjects of this study consisted of 101 eyes who had undergone cataract surgeries with a 3-piece aspheric IOL (54 eyes) and with a single-piece aspheric IOL (47 eyes). The decentration, tilt, anterior chamber depth, and refraction were measured on postoperative day 1, 1 month, and 2 months, using an anterior eye segment analysis system (EAS-1000, Nidek, Japan).

There was a statistically significant difference in the decentration on the postoperative day 1 ( p = 0.04). However, there was no statistically significant difference on postoperative 1 month ( p = 0.15) and 2 months ( p = 0.13). There was no statistically significant difference in the tilt on postoperative day 1, 1 month, and 2 months. There was no statistically significant difference in the anterior chamber depth on postoperative day 1, 1 month, and 2 months. There was a statistically significant difference in the refraction on postoperative day 1 ( p = 0.03). However, there was no statistically significant difference on postoperative 1 month ( p = 0.07) and 2 months ( p = 0.07).

There was no statistically significant difference in the decentration, anterior chamber depth, and refraction between the 3-piece and single-piece aspheric IOL. Therefore, there is no difference between the 3-piece and single-piece aspheric IOL in the capsular bag stability until 2 months postoperatively.