Components of Lens Power That Regulate Surface Principal Powers and Relative Meridians Independently

Table 1

Aligned meridians and commuting surface power matrices. The reader can match the symmetry on respective lens surfaces of meridians in the first column with those in the first row. Meridians have been aligned on surfaces where possible. From (9) power matrices commute for aligned meridians since their power matrices have equal eigenvectors: . At not-equal signs, the meridians from opposite lens surfaces cannot physically align.

	Rotational symmetry	Oblique meridians	Toric symmetry
Rotational symmetry
Oblique meridians
Toric symmetry