Patent ID: 8333471
Filing Date: 2012-12-18
Classification: G02C

Abstract:
1. Series of progressive ophthalmic lenses, indexed by values of a set of parameters comprising an optical power addition of a spectacle eyeglass which can be produced from each lens of the series, between a far-vision reference direction and a near-vision reference direction through said eyeglass, the far-vision reference direction being a direction of vision passing through a fitting cross marked on each lens, the optical power addition value of each lens being inscribed on said lens, each lens moreover determining a further difference between an optical power value for the near-vision reference direction and a maximum value of the optical power of an eyeglass which is produced from said lens, said maximum value of the optical power being reached for a direction of gaze pointing below the near-vision reference direction for a use position of the eyeglass, the series of lenses being characterized in that said further difference, in absolute value and expressed in dioptres, is comprised between 0.025×A and 0.0775 A where A is the optical power addition expressed in dioptres, comprised between 0.25 dioptre and 5 dioptres.