Large filed of view achromatic EDoF IOL design

Tingting Meng; Chunmei Zeng

doi:10.1117/12.2691945

6 November 2023 Large filed of view achromatic EDoF IOL design

Tingting Meng, Chunmei Zeng

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 1292150 (2023) https://doi.org/10.1117/12.2691945
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

To provide cataract patients with better visual outcomes after surgery, an achromatic EDoF IOL based on folding and diffraction mixing was investigated. First, the faceted shape of the IOL and the specific functions achieved are described. Then, a diffraction surface sub-region design method linked with the pupil size is proposed. Finally, a nine-region achromatic extended depth-of-focus IOL was designed using this method. The design results showed that the MTF values (50 lp/mm) were higher than 0.35 for 0° to 8° field of view and all object distances (0.25 m to infinity) in compound light at a pupil diameter of 3 mm. When the pupil changes from 2 mm to 5.5 mm, the MTF value (50 lp/mm) remains higher than 0.2 for all object distances in the 0° field of view. At a pupil diameter of 4 mm and an object distance of 2 m, the vertical chromatic aberration of the maximum field of view in complex light was within the Avery spot, and the results were consistent for other object distances. From the above analysis, it can be concluded that the designed IOL achieves well the function of extending the depth of focus, eliminating chromatic aberration, and further expanding the visual field.

Citation Download Citation

Tingting Meng and Chunmei Zeng "Large filed of view achromatic EDoF IOL design", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 1292150 (6 November 2023); https://doi.org/10.1117/12.2691945

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KEYWORDS

Design and modelling

Modulation transfer functions

Chromatic aberrations

Diffraction

Aspheric lenses

Eye models

Image quality

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