介绍了渐变多焦点眼镜的表面形貌特征和应用，叙述了渐变多焦点眼镜的测量以及数据处理的方法。
This paper introduces the character of PAL surface and its application, then describes a methodology of measurement and data treatment for PAL.
配戴近距离阅读附加双焦点眼镜的近视青少年近视增长速度明显低于配戴单焦点普通近视眼镜的近视青少年患者。
This study was to investigate whether the adolescent myopia can be controlled after they wear double-focus spectacles of near-distance reading addition.
方法：随机抽取昆明医学院眼科视光中心配戴渐进多焦点眼镜的青少年41人作为渐进镜组，同样抽取年龄相当的普通眼镜配戴者资料42份作为对照组。
Methods: 41 teenages wearing mutifocal lens were collected into mutifocal lens group and anther 42 normal glasses wearing teenagers were selected as normal control group randomly.
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