光力 meaning in English

luminous intensity
luminous power

The light power of the composite system is equal to the ratio of the two single light power's .
组合系统的光力则为两个单个光力之比。
A correlative study on diopter and corneal refractive power in juvenile myopia
青少年近视眼屈光度与角膜屈光力的相关性研究
Analysis of measuring corneal refractive power by corneal topographer compared with by keratometer
角膜地形图仪和角膜曲率计测量角膜屈光力的差异分析