Fellow-Eye Comparison of Monocular Visual Outcomes Following Monofocal Extended Depth-of-Focus (EDOF) and Trifocal EDOF Intraocular Lens Implantation.

Purpose: To compare intraindividual monocular visual performance of a monofocal extended depth-of-focus (EDOF) and a trifocal EDOF intraocular lens (IOL) following bilateral cataract surgery.

Design: Single-center, prospective, fellow-eye comparison clinical trial.

Methods: All patients received uneventful bilateral cataract surgery with implantation of the monofocal EDOF Isopure IOL in the dominant eye and the trifocal EDOF FineVision Triumf IOL in the nondominant eye. Intraindividual monocular comparison included visual acuity at various distances, defocus curves, internal total higher-order aberration (HOA), spherical aberration (SA) Z(4.0), IOL decentration, and tilt. Additionally, subjective outcomes were evaluated using Halo and Glare simulation and the Seven-Item Visual-Functioning Index questionnaire.

Results: In total, 25 patients (50 eyes) were included. Intraindividual monocular best-corrected distance visual acuity, distance-corrected intermediate visual acuity, and best-corrected near visual acuity were comparable (P > .05). However, monocular contrast acuity (P = .019), distance-corrected near visual acuity (P < .001), and defocus curves at defocus levels of 0.0 D (P = .005) and between -1.5 and -4.0 D (P < .001) differed significantly. At 5 mm, internal HOA and SA Z(4.0) were significantly different (P < .001) and comparable at 3-mm pupil diameter, as were IOL tilt and decentration (P > .05).

Conclusion: In this combined fellow-eye comparison, near vision was significantly better with the trifocal EDOF IOL. The monofocal EDOF IOL demonstrated similar distance and intermediate visual performance as the trifocal EDOF IOL. Overall, low values of photic phenomena and visual impairment were observed.