polymérisé

OBS: (...) les lentilles prennent leur forme définitive dans un moule chauffé et centrifugé (Soflens ou Bausch et Lomb) (...)

OBS: Method (...) derived from a revolving mould that whirls the liquid plastic at high speed. The result is a parabola whose inside curvature can shorten or lengthen depending upon the speed of rotation. The procedure is basically a kind of pressureless moulding.
OBS: The spin cast process, devised and patented by Bausch and Lomb, produces a highly reproducible lens with a very smooth surface. This means that the lens is so standardized that all replacement lenses are duplicates of the original regardless of where in the world they are purchased.