31 October 2016 Optimization of aspheric multifocal contact lens by spline curve
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Abstract
This paper presents a solution for design aspheric multifocal contact lens with various add powers. The multi-aspheric curve on the optical surface profile is replaced by a single freeform spline curve. A cubic spline curve is optimized to remove all unsmooth transitions between different vision correction zones and still satisfy the power distribution of the aspheric multifocal contact lens. The result shows that the contact lens using a cubic spline curve could provide not only a smooth lens surface profile but also a smooth power distribution that is difficultly obtained by an aspheric multifocal contact lens. The proposed contact lens is easily transferred to CAD format for further analysis or manufacture. Results of this study can be further applied for progressive contact lens design.
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Vu. T. Lien, Chao-Chang A. Chen, Yu-Ting Qiu, "Optimization of aspheric multifocal contact lens by spline curve", Proc. SPIE 10021, Optical Design and Testing VII, 100210L (31 October 2016); doi: 10.1117/12.2246226; https://doi.org/10.1117/12.2246226
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