Influence of biometric parameters on rotational 
stability of toric IOLs.

PURPOSE: The aim of the study was to determine the influence of axial length (AL) and anterior chamber depth (ACD) on the rotational stability of a toric intraocular lens (IOL).

METHODS

In this retrospective study, 40 eyes of 40 patients were included. All patients underwent phacoemulsification and had AcrySof toric IOL implantations. The AL and the ACD (epithelium to lens) were measured using optical coherence biometry. Cornea astigmatism was determined by topography. Rotational stability was measured 1 day, 1 week, 4 weeks, and 3 months postoperatively.

RESULTS

The mean AL and ACD were 23.91 ± 1.51 and 2.91 ± 0.37 mm. The medial rotation was 2.47 ± 
22.7, 2.92 ± 2.93, 2.56 ± 2.07, and 2.37 ± 2.29 degrees from baseline at 1 day, 1 week, 4 weeks, and 3 months, respectively. No correlation occurred between AL and ACD and IOL rotation at any time.

CONCLUSION

Biometric parameters may not influence the rotational stability of this type of acrylic posterior chamber toric IOL in the short term.