Spectacle ophthalmic lens intended to be mounted on a spectacle frame
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsYu Richard LIU, Diana CHANDRA, Pauline COLAS
Life of this patent
Estimating the term…
Abstract
A spectacle ophthalmic lens mountable on a spectacle frame, the ophthalmic lens including: a fitting cross where the optical power is negative; a first zone extending in a temporal side of the fitting cross, wherein in the first zone when the ophthalmic lens is mounted on the spectacle frame, the optical power increases when a gazing direction moves towards the temporal side, and wherein over a nasal side of the fitting cross, the optical power of the ophthalmic lens is substantially same as at the fitting cross.
Claims16
1-15. (canceled)
A spectacle ophthalmic lens mountable in a frame, the ophthalmic lens comprising, in wearing conditions:
- a fitting cross wherein optical power is negative;
- a first zone extending in a temporal side of the lens, wherein in the first zone, the optical power increases when moving towards the temporal side, and wherein over a nasal side of the lens, the optical power of the ophthalmic lens is substantially same as at the fitting cross.
A method for determining a spectacle ophthalmic lens adapted for a wearer, the method comprising:
- a wearer data providing during which wearer data comprising at least a wearer's ophthalmic prescription is provided;
- a first surface providing during which a first surface is provided;
- a second surface providing during which a second surface is provided;
- a positioning during which relative position of the first and second surfaces is determined to form an ophthalmic lens including a fitting cross with a negative optical power corresponding to the wearer's ophthalmic prescription, a horizontal first zone extending in a temporal side of the lens, wherein in the first zone the optical power increases when moving towards the temporal side and wherein over a nasal side of the lens the optical power is substantially same as at the fitting cross;
- wherein at least one of the first and second surface is a progressive addition surface.
Dependencies are inferred from the claim text.