Clinical Outcomes in Patients After Duet Procedure for Reversible Trifocality Using a Supplementary Trifocal...

We report the clinical outcomes of patients who had primary lens implantation in the capsular bag and subsequently a supplementary trifocal lens implanted in the ciliary sulcus (duet procedure) to create reversible trifocality.

Retrospective interventional case series.

This single-center clinical study included 25 patients who had undergone either refractive lens exchange for presbyopia correction or cataract surgery. All had lens removal by phacoemulsification and duet procedure to achieve reversible trifocality. Preoperatively and 3 months postoperatively, uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) were assessed, as well as uncorrected near visual acuity (UNVA), distance corrected near visual acuity (DCNVA), and corrected near visual acuity (CNVA). At the postoperative examination, uncorrected intermediate visual acuity (UIVA), distance corrected intermediate visual acuity (DCIVA), and corrected intermediate visual acuity (CIVA), defocus curve testing, and dysphotopsia evaluation were also performed.

Monocular UDVA and CDVA improved from 0.71 ± 0.43 logarithm of the minimum angle of resolution (logMAR) and 0.12 ± 0.16 logMAR preoperatively to 0.04 ± 0.10 logMAR and -0.01 ± 0.09 logMAR postoperatively. Monocular UNVA and DCNVA were both 0.06 ± 0.08 logMAR and UIVA and DCIVA 0.00 ± 0.10 logMAR and -0.02 ± 0.10 logMAR postoperatively. Monocular defocus curve testing revealed a visual acuity of 0.2 logMAR or better from +0.75 to -3.5 diopters.

Duet procedure using a trifocal supplementary intraocular lens provided excellent results for far, near, and intermediate distance, comparable to those reported for capsular bag fixated trifocal intraocular lenses. The duet procedure offers the advantage of an exit strategy in cases with a future loss of function or side effects associated with the optics.