Keating M P
Am J Optom Physiol Opt. 1981 Dec;58(12):1154-60. doi: 10.1097/00006324-198112000-00016.
An effective dioptric power matrix is defined. The effective dioptric power matrix can be calculated directly from the lens dioptric power matrix, its trace, and its determinant, without using the sphere, cylinder, and axis parameters of the lens. This greatly simplifies any calculations in which dioptric power matrices are obtained in intermediate steps, including separated obliquely crossed spherocylindrical lens calculations. The generalization of the effective dioptric power matrix to a reduced vergence matrix is also discussed.
定义了一个有效的屈光力矩阵。有效屈光力矩阵可以直接从透镜屈光力矩阵、其迹和行列式计算得出，而无需使用透镜的球镜、柱镜和轴位参数。这极大地简化了在中间步骤中获得屈光力矩阵的任何计算，包括分开的斜交球柱镜计算。还讨论了有效屈光力矩阵到简化聚散度矩阵的推广。
