| 摘要 |
Finished ophthalmic lens and corresponding methods. Finished ophthalmic lens having one concave face and one convex face and an outer perimeter (1) and which also has : a thickness within a pre-established range; a central useful area (3) that fulfils a particular, pre-established ophthalmic prescription, which defines a machined surface, and which has a useful perimeter (5) that coincides with the perimeter of a particular, pre-established frame; and an outer transition area that joins useful perimeter (5) of central useful area (3) to outer perimeter (1). Transition area (7) comprises a transition surface that extends as a continuation of the machined surface and as far as outer perimeter (1), and is continuous and its derivative is continuous on all points, including the joining line between the transition surface and the machined surface. |
