Keating M P
Am J Optom Physiol Opt. 1981 Nov;58(11):919-29. doi: 10.1097/00006324-198111000-00003.
The 4 x 4 system matrix is applied to corrected astigmatic systems including a schematic eye in which each surface is astigmatic at a different axis. In addition to representing the eye, the 4 x 4 system generates 2 x 2 magnification matrices which describe the meridional magnifications that occur in the presence of astigmatism including the magnifications that occur with bitoric eikonic correcting lenses, or other meridional magnifying systems.
4×4系统矩阵应用于矫正散光系统，包括一种示意眼模型，其中每个表面在不同轴向上存在散光。除了表示眼睛外，4×4系统还生成2×2放大矩阵，该矩阵描述了在散光存在时发生的子午线放大率，包括双曲面屈光矫正镜片或其他子午线放大系统所产生的放大率。
