Contacts For Irregular Astigmatism, Keratoconus or Pellucid Marginal Degeneration. Scleral...
Toric lens
A toric lens is a lens with different optical power and focal length in two orientations perpendicular to each other. One of the lens surfaces is shaped like a "cap" from a torus, and the other one is usually spherical. Such a lens behaves like a... Wikipedia