Meier A M, Lowther G E
J Am Optom Assoc. 1983 Mar;54(3):263-5.
The power distribution across Bausch and Lomb Soflens PAI Bifocal lenses was measured using a series of double aperture stops on a lensometer. The add power at different distances from the lens center is presented. A gradual increase in plus power approximately equivalent to an aspheric back surface of an eccentricity of 0.75 was found. The change in add with change in apical radius (lens distance power) is also reported. The measured change is compared to the calculated power change over the same radius range.
使用焦度计上的一系列双孔径光阑测量了博士伦Soflens PAI双焦点镜片的屈光力分布。给出了距镜片中心不同距离处的附加屈光力。发现正屈光力逐渐增加，大致相当于非球面后表面偏心率为0.75的情况。还报告了附加屈光力随顶点半径变化（镜片距离屈光力）的变化情况。将测量的变化与在相同半径范围内计算的屈光力变化进行了比较。
