Toroidal lens can be see as one spherical rotate on the aixs of another spherical. So it has a Rx on the X aixs and have a Ry on the Y aixs, Toroidal lens can be used to replace complicated optical system.improving imaging quality, hence reducing optical system weight.

Toroidal mirror is mainly used for reflected light of large Angle., which is different from plane mirror and spherical mirror that have deformation image, so toroidal lens can reduce the number of optical lens. And widely used in astigmatism correction scancer, bio analyzer, and other medical equipment.