光学学报, 2020, 40 (4): 0422001, 网络出版: 2020-02-11
控制近视进展并矫正近视散光的隐形眼镜 下载: 1303次
Contact Lens for Controlling Myopia Progression and Correcting Myopia and Astigmatism
光学设计 隐形眼镜 近视进展 近视并发散光 调制传递函数 周边离焦 optical design contact lens myopia progression myopia and astigmatism modulation transfer function peripheral defocus
摘要
为控制青少年的近视进展并矫正近视并发散光,设计一款多区域非球面隐形眼镜。运用Zemax构建了-3 D(屈光度)近视联合-1.5 D散光的眼模型,基于此模型分别优化了隐形眼镜前表面各区域的面型参数,得到一款直径为14.4 mm、中心厚度为0.06678 mm的隐形眼镜,并分析佩戴此隐形眼镜眼模型的成像性能及周边离焦情况。结果表明,眼模型在3 mm(直径)瞳孔下视远时,空间频率50 cycle/mm处的调制传递函数(MTF)在0°~7°视场内均高于0.7,表明近视和散光均得到良好矫正。当隐形眼镜出现30°以内的旋转或0.7 mm以内的偏心时,佩戴隐形眼镜的眼模型的成像性能保持相对稳定。此外,眼模型在3 mm瞳孔下25°视场的离焦值高达-9.5 D;在6 mm瞳孔下0°~30°视场内的离焦值均在-6 D左右,表明此款隐形眼镜提供了较大的周边近视性离焦值,具有控制近视进展的潜力。
Abstract
A multizone aspheric contact lens was designed to control myopia progression as well as correct myopia and astigmatism. An eye model of -3 D (Dioptre) myopia combined with -1.5 D astigmatism was constructed in Zemax software, based on which the anterior surface parameters of the contact lens were optimized. A multizone contact lens with a diameter of 14.4 mm and a central thickness of 0.06678 mm was obtained. The imaging performance and the relative peripheral myopic shift of the eye model with the designed contact lens were analyzed. The modulation transfer function (MTF) values at 50 cycle/mm are higher than 0.7 under 3 mm (in diameter) pupil for 0°--7° field of view (FOV) for distance vision, indicating that both myopia and astigmatism are corrected. Moreover, the MTFs remain relatively stable when the contact lens rotates within 30° or decentres within 0.7 mm. In addition, the myopic defocus of the model eye with the designed contact lens is up to -9.5 D at 25° FOV under 3 mm pupil, and around -6 D under 6 mm pupil for 0°-30° FOV. The results have indicated that the designed contact lens can provide greater peripheral myopic defocus, exhibiting highly potential to control the myopia progression.
边亚燕, 刘永基, 刘宝凯, 谷健达. 控制近视进展并矫正近视散光的隐形眼镜[J]. 光学学报, 2020, 40(4): 0422001. Yayan Bian, Yongji Liu, Baokai Liu, Jianda Gu. Contact Lens for Controlling Myopia Progression and Correcting Myopia and Astigmatism[J]. Acta Optica Sinica, 2020, 40(4): 0422001.