Patent ID: 8506074
Filing Date: 2013-08-13
Classification: G02C

Abstract:
1. An ophthalmic lens including at least one aspherical face having an optical centre defined as being a point of the lens such that a light ray from infinity and crossing the lens at this point does not undergo any angular deviation, a geometrical centre and successively comprising a top vision region, an intermediate vision region and a bottom vision region, as well as a principal meridian of progression crossing said three vision regions of the aspherical face, wherein: the top vision region is adapted for mid-distance vision, said mid-distance being a distance between 80 cm and 5 m, and said top vision region corresponding to a region of the aspherical face located above the optical centre and having a constant sphere power on the principal meridian of progression, and a value of which is comprised between 0.2 and 2.0 diopters; the bottom vision region is adapted for close distance vision, said close distance being a reading distance between 20 and 40 cm, and said bottom vision corresponding to a region of the aspherical face located below an optical centre and having a constant sphere power on the principal meridian of progression, and a value of which is comprised between 0.8 and 3.5 diopters; and the intermediate vision region is adapted for intermediate distance vision, said intermediate distance being a distance between 50 and 80 cm, beyond the close distance and below the mid-distance, said intermediate vision region corresponding to a region of the aspherical face having a sphere power variation along the principal meridian of progression between the top and bottom vision regions, said sphere power variation being comprised between 0.6 and 2.2 diopters; and wherein said aspherical face has an optical centre in said intermediate vision region, said optical centre coinciding with the geometrical centre of the aspherical face.