Spectacle ophthalmic lens intended to be mounted on a spectacle frame
AssigneeEssilor International
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.
Claims20
A spectacle ophthalmic lens mountable in a spectacle frame, the ophthalmic lens comprising, in wearing conditions:
- a fitting cross where optical power is negative;
- a temporal side;
- a nasal side;
- and
- a first zone extending in a temporal side of the lens,
- wherein, in the first zone, the optical power increases from a part of said first zone closest from the fitting cross to a part of said first zone closest to a temporal edge of the ophthalmic lens when moving towards the temporal side, and
- wherein, over the 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:
- providing wearer data comprising at least a wearer's ophthalmic prescription;
- providing a first surface;
- providing a second surface;
- positioning a relative position of the first and second surfaces 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 from a part of said first zone closest from the fitting cross to a part of said first zone closest to a temporal edge of the ophthalmic lens when moving towards the temporal side,
- wherein over a nasal side of the lens the optical power is substantially same as at the fitting cross;
- and
- wherein at least one of the first and second surface is a progressive addition surface.
A spectacle ophthalmic lens mountable in a spectacle frame, the ophthalmic lens comprising, in wearing conditions:
- a fitting cross where optical power is negative;
- a temporal side;
- a nasal side;
- and
- 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,
- wherein, over the nasal side of the lens, the optical power of the ophthalmic lens is substantially same as at the fitting cross, and
- wherein an absolute value of addition in the horizontal first zone is smaller than or equal to an absolute value of the optical power at the fitting cross of the ophthalmic lens.
Dependencies are inferred from the claim text.