Toric intraocular lens orientation and residual refractive astigmatism: an analysis

Abstract

The percentage of eyes with lens orientation ≥5° from intended in the Toric Results Analyzer data set was <1% of toric IOLs in general, with the relative percentage of Tecnis^® Toric IOLs significantly higher than AcrySof^® Toric IOLs. Both of these had higher rates than the Staar^® Toric and Trulign^® Toric lenses, with the availability of higher Tecnis and AcrySof cylinder powers a likely contributing factor. The AcrySof Toric IOL appears to be less likely than the Tecnis Toric IOL to cause residual astigmatism as a result of misorientation. The Tecnis Toric IOL appears more likely to be misoriented in a counterclockwise direction; no such bias was observed with the AcrySof Toric, the Trulign^® Toric, or the Staar Toric IOLs.