阐述了渐进多焦点眼用镜片的矢高分布设计原理，提出了一种利用调节主曲率差对平均曲率影响进行渐进多焦点眼用镜片优化设计的方法。比较设计和实际加工镜片优化前后的效果，优化前后镜片有效视区球光度保持不变，优化后镜片渐进通道最窄处宽度增加了0.7 mm，视近区有效视觉面积明显增大，最大散光度略有减小。结果表明，提出的主曲率差优化设计方法对渐进多焦点眼用镜片的设计加工有实用价值。

The heights design principle of progressive addition lenses is described. A method is proposed to change the mean curvature to design and optimize progressive addition lenses by adjusting the main curvature difference. The designed and manufactured results of progressive addition lenses are compared, and the powers in effective usable portions are maintained before and after optimization. The intermediate widths of the optimized lens are 0.7 mm wider than those of the unoptimized ones. The areas of the effective visual region of the optimized lens are broader than those of the unoptimized lens. The maximum astigmatism reduces slightly. It is shown that the design and optimization method proposed meet the practical demands.