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Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
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Physiological chromatic model eyes for IOL characterization.

Miguel Faria-Ribeiro1, Noé Villemagne2, Luc Joannes2

  • 1Center of Physics of Porto and Minho Universities, University of Minho, Braga, Portugal.

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|May 18, 2026
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Summary
This summary is machine-generated.

A new chromatic model eye accurately simulates physiological chromatic aberration for intraocular lens (IOL) testing. This standards-compliant framework ensures reliable optical bench characterization of IOLs under white-light conditions.

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Area of Science:

  • Ophthalmic Optics
  • Optical Engineering
  • Biomedical Devices

Background:

  • Accurate optical bench characterization of intraocular lenses (IOLs) requires model eyes simulating physiological spherical aberration (SA) and longitudinal chromatic aberration (LCA).
  • Current standards (ISO, ANSI) reference LCA but lack a rigorous framework for validating the physiological chromatic baseline of complete bench systems.
  • A need exists for a model eye that precisely replicates physiological chromatic properties for reliable IOL testing.

Purpose of the Study:

  • To propose and validate a chromatic model eye system for accurate optical bench characterization of intraocular lenses (IOLs).
  • To establish a standards-compliant framework for validating the physiological chromatic baseline of IOL testing benches.
  • To ensure model eyes reproduce physiologically relevant spherical aberration (SA) and longitudinal chromatic aberration (LCA) under white-light conditions.

Main Methods:

  • Developed a chromatic model eye featuring an achromatic doublet cornea compatible with standard ISO and ANSI geometries.
  • Achieved varying physiological SA levels by adjusting the posterior-surface conic constant while maintaining physiological LCA.
  • Evaluated LCA using the paraxial vergence of the exit-pupil wavefront, referenced to the spectacle plane of a physiological reference eye.

Main Results:

  • The proposed model eye successfully reproduced pseudophakic LCA within the ANSI Physiological benchmark for IOLs with high and low Abbe numbers (400-700 nm).
  • Deviations in LCA were minimal, below 0.02 D for high-Abbe IOLs and 0.06 D for low-Abbe IOLs.
  • Polychromatic Modulation Transfer Function (MTF) analysis showed trends consistent with residual LCA differences across model eyes.

Conclusions:

  • The developed chromatic model eye provides a standards-compliant framework for the chromatic validation of IOL test benches.
  • This model accurately reproduces physiologically relevant LCA and SA, crucial for reliable white-light characterization of intraocular lenses.
  • The findings support enhanced accuracy and consistency in optical bench testing of IOLs, aligning with physiological conditions.