ESCRS - FP32.01 - To Assess The Impact Of Spiral And Diffractive Optical Designs On Dysphotopsia And Visual Range / Outcome

To Assess The Impact Of Spiral And Diffractive Optical Designs On Dysphotopsia And Visual Range / Outcome

Published 2026 - 44th Congress of the ESCRS

Reference: FP32.01 | Type: Free paper | DOI: 10.82333/7vz3-x386

Authors: Dr Kieren Darcy* 1 , Nancie Edwards 1

1Vision Care Clinic,Bristol,United Kingdom

Purpose

To evaluate whether optical design influences refractive precision, visual range performance, vision quality and to identify clinically meaningful differentiators to guide lens selection.

Setting

Single surgeon, single UK clinic. 

Methods

In this prospective comparative clinical study, eyes implanted with a refractive spiral IOL (RayOne Galaxy, Rayner; n=98) or a diffractive multifocal IOL (FineVision, BVI; n=22) were assessed at 3 months. Outcomes included refractive accuracy, monocular and binocular visual acuity (distance, intermediate 66 cm, near 40 cm), and defocus curves. Contrast sensitivity (SCV-1000) was measured under photopic and mesopic conditions. Dysphotopsia was evaluated using halo/glare simulation and Aston halometry.

 

Results

At 3 months, the spiral IOL demonstrated tighter SEQ clustering (91% within ±0.50 D vs 82%) and lower residual astigmatism ≤0.50 D (90% vs 59%). Both IOLs maintained binocular visual acuity within 0.20 logMAR supporting effective full-range functional vision. Contrast sensitivity was similar photopic ally; mesopic performance showed a trend favoring the spiral design at higher spatial frequencies.Dysphotopsia profiles differed meaningfully. Halo size and intensity were lower with Galaxy (27 vs 42; 42 vs 66), confirmed by reduced halometry area (4.66% vs 7.65%).

 

 

 

 

Conclusions

Optical design influenced the relationship between visual range performance and dysphotopsia profile. Although both IOLs provided effective functional vision, distinct photic-phenomena patterns were observed, with potential clinical relevance for patients sensitive to halos or with higher night-driving demands. Ongoing research is evaluating the impact of individual dysphotopsia tolerance, night-vision requirements, and patient-related factors on optimized lens selection.