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Design of customized freeform progressive addition lens based on localized precision optimization
Optics Express
|June 14, 2025
Summary
This study introduces a new method for customizing progressive addition lenses (PALs) with precise optical control. The innovative design ensures accurate vision correction, improving visual performance for spectacle wearers.
Area of Science:
- Ophthalmic Optics
- Optical Engineering
- Materials Science
Background:
- Current progressive addition lenses (PALs) suffer from rigid zonal design and insufficient precision in primary visual zones.
- These limitations lead to suboptimal visual correction and wearer dissatisfaction.
Purpose of the Study:
- To propose and validate a customized PAL design method featuring localized precision optimization.
- To address the limitations of existing PAL designs by enhancing optical power and astigmatism control.
Main Methods:
- Systematic definition of an objective function using customizable surface parameters.
- Incorporation of precise constraints for optical power and astigmatism in primary visual zones.
- Derivation of optimal surface data through advanced optimization algorithms.
Main Results:
- Successful customization of two sets of PAL parameters demonstrating design feasibility.
- Achieved accurate optical power and astigmatism distributions within specified zones.
- Optical power deviations within ±0.06D and astigmatism below 0.12D in key visual zones.
Conclusions:
- The proposed method integrates customized zonal distribution with localized accuracy for optical power and astigmatism.
- This approach offers a viable design strategy for future customized progressive addition lenses.
- Enhanced precision control in PALs leads to improved visual performance and wearer comfort.
