Optical Simulation Versus Photonic Bench Validation Of Through-Focus Point Spread Functions In Spiral And Enhanced Monofocal Intraocular Lenses
Published 2026 - 44th Congress of the ESCRS
Reference: PP24.06 | Type: Poster | DOI: 10.82333/xpwf-e524
Authors: Mr José Vinicius 1 , A/Prof. Jonathas M. de Oliveira 1 , A/Prof. Alcenísio J. Jesus-Silva 1 , A/Prof. Eduardo Jorge da Silva Fonseca 1 , A/Prof. Christian Kohler 2 , Mr Lucas Campos 3 , A/Prof. Jorge Artur Peçanha de Miranda Coelho 4 , Prof. Dr Joao Marcelo Lyra* 5
1PHYSICS,UFAL,MACEIO,Brazil, 2ENGINEERING,UFAL,MACEIO,Brazil, 3ENGINEERING,LOGOS BIOSCIENCE,MACEIO,Brazil, 4MEDICINE,UFAL,MACEIO,Brazil, 5OPHTHHALMOLOGY,UNCISAL,MACEIO,Brazil
Purpose
To compare optical simulation derived point spread functions (PSF) with high dynamic range (HDR) photonic bench PSF measurements and to quantify through-focus PSF structuring thresholds for a spiral-design intraocular lens (IOL) versus an enhanced monofocal IOL.
Setting
Optical bench laboratory with an ISO-based model eye and a custom HDR imaging path.
Methods
Optical simulation software was used to compute polychromatic PSF stacks along the defocus axis and to estimate functional depth of focus. Experimentally, a continuous-wave 532 nm laser illuminated a 200 µm pinhole and the beam was relayed and collimated through an achromatic corneal element in a model eye. The IOL was immersed in 0.9% sodium chloride solution with a 3.0 mm pupil. Longitudinal PSF images were captured by translating an HDR CMOS camera across focus and compared with the corresponding ‘Galaxy’ simulation outputs.
Results
At best focus, the spiral IOL and the enhanced monofocal IOL produced comparable central PSF cores. Across defocus, the spiral IOL maintained a compact core and began to form a structured PSF pattern at −2.8 D, whereas the enhanced monofocal showed earlier PSF structuring at −1.25 D. This shift indicates a broader, more continuous corridor of vision for the spiral design. Optical simulations demonstrated consistent qualitative agreement with the measured through-focus HDR PSF stacks.
Conclusions
Optical simulation provides a reliable predictor of through-focus PSF behavior when validated against photonic bench HDR measurements. The spiral IOL exhibited delayed PSF structuring versus the enhanced monofocal, supporting a wider functional depth of focus with a continuous through-focus PSF