Reiner J
Klin Monbl Augenheilkd. 1977 Dec;171(6):946-53.
Spectacle lenses with variable optic power are indeed no replacement but are an interesting addition to the group of visual aids for correcting presbyopic patients. Since the first commericial lenses of this kind appeared in the year 1959, further sorts of glass with variable properties have been developed. These were evaluated and compared with each other.
具有可变光学焦度的眼镜镜片确实无法替代其他视觉辅助工具，但却是矫正老花眼患者的视觉辅助工具组中一个有趣的补充。自1959年首批此类商业镜片问世以来，已开发出具有不同特性的其他类型玻璃。这些玻璃经过了评估并相互比较。
