The contact lens has a front toric surface
and dynamic (with bumps) stabilization.
For the creation of a toric surface where two radiuses are staggered by 90[degrees], the tool has to make two moves for one rotation.
By means of examples the article shows results of experimental investigations of precision-machined toric surfaces, which were realised in co-operation with Jenoptik Polymer Systems GmbH.
1) consists of tree metallic moulds and two plastic prototypes with toric surfaces (metallic moulds: radiuses R 800 and R 600; plastic moulds: radiuses R 800 and R 100).
The components with toric surfaces were manufactured on the ultra-precision turning lathe Nanoform 350 of the company Precitech (see fig.
The STS procedure is used for manufacturing of non-rotation-symmetric connected surfaces such as toric surfaces.
The human cornea is neither a true spherical, nor a true toric surface, but is a relatively complex aspheric surface with the degree of asphericity varying in each of the principle meridians.
These lenses have a toroidal back surface and theoretically a spherical front surface, although in reality, most lenses are manufactured with a compensating front toric surface.
Since its launch, it has continued to evolve and now offers enhanced, advanced design features, including toric surfaces
and quadrant specific edge lifts.
Aimed at both researchers and graduate students interested in various aspects of combinatorial theories, topics here include combinatories of polytopes, lattice polytopes, triangulations and subdivisions, Cohen-Macaulay cell complexes, monomial ideals, the geometry of toric surfaces
, groupoids in combinatories, Kazhdan-Lusztig combinatories and graph colorings.