Defocus curves of 4 presbyopia-correcting IOL designs: Diffractive panfocal, diffractive trifocal, segmental refractive, and extended-depth-of-focus

Abstract

To evaluate the defocus curves of 4 presbyopia-correcting intraocular lenses (IOLs). Department of Ophthalmology, Goethe University, Frankfurt, Germany. Prospective case series. Patients included in the study had bilateral surgery with implantation of diffractive panfocal, diffractive trifocal, segmental refractive (SegRef), or extended-depth-of-focus (EDOF) presbyopia-correcting IOLs. The uncorrected (UDVA) and corrected (CDVA) distance visual acuities, uncorrected intermediate and near visual acuities, distance-corrected intermediate (DCIVA) and near (DCNVA) visual acuities, defocus curve, and spectacle independence were measured. The UDVA and CDVA were not significantly different between groups (P>.05); however, the EDOF group had worse near CDVA (P<.001). The trifocal and EDOF groups showed better DCIVAthan the panfocal and SegRef group at 80cm(P<.001); the EDOF and panfocal groups had comparable DCIVA at 60cm(P>.05). Defocus curves showed no significant between-group differences from 4m to 2m(P>.05). The EDOF group had better visual acuity from 1m to 67cm than the trifocal and SegRef groups and better visual acuity than the panfocal group at 1m(P>.05). Compared with the other IOLs, the panfocal IOL yielded significantly better visual acuity at 50cm(P<.001) and the EDOF IOL worse visual acuity at 40cm(P<.01). There was a significant difference in spectacle independence between the panfocal group and EDOF group (P<.05) but no difference between the other groups. The 4 IOLs provided equally good CDVA. The EDOF IOL yielded slightly better DCIVA but worse DCNVA than the other IOLs. Only the panfocal IOL gave better DCIVA at 50cm.