Opt Express. 2020 Nov 9;28(23):33982-33993. doi: 10.1364/OE.408770.
Presbyopia is the failure of the eye lens to accommodate. The widely used presbyopia correction method involves wearing bi/trifocal or progressive glasses, which limits the field of view due to division of lens area into sections of different optical power. A large aperture focus tunable liquid crystal lens has the potential to correct human eye accommodation failure and provide a wide field of view. In this paper, we present characterization and demonstration of a segmented phase profile liquid crystal lens, which has the characteristics of a large area (diameter: 20 mm), being flat and thin (<2 mm), and having continuous focus tunability (1.5 D to 0 D), fast response time (<500 ms), low operating voltage (<5 V), and on-axis diffraction-limited performance (for a 5mm aperture). Considering all these properties, our lens provides performance details of an approach for presbyopia correction. We have tested the minimum resolution and visual acuity of 20 subjects using the designed lens and compared the results with a reference glass lens of the same optical power.
老视是眼睛晶状体调节能力的下降。目前广泛使用的老视矫正方法包括佩戴双焦或渐进多焦点眼镜，由于将镜片区域分为具有不同光焦度的多个部分，这些方法会限制视野。大孔径、焦点可调谐的液晶透镜具有矫正人眼调节力丧失和提供大视场的潜力。在本文中，我们展示了分段相位分布液晶透镜的特性和演示，该透镜具有大面积（直径：20 毫米）、平坦和薄（<2 毫米）、连续焦点可调谐（1.5D 至 0D）、快速响应时间（<500 毫秒）、低工作电压（<5V）和轴上衍射受限性能（对于 5 毫米孔径）的特点。考虑到所有这些特性，我们的透镜为老视矫正方法提供了性能细节。我们使用设计的透镜测试了 20 名受试者的最小分辨率和视力，并将结果与相同光焦度的参考玻璃透镜进行了比较。
