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US 2018/0321509 A1Published application
Lenses with improved management of distortion
AssigneeEssilor International
InventorsHelene DE ROSSI, Fabien MURADORE
Life of this patent
Estimating the term…
Abstract
Ophthalmic lenses intended to be worn by non-presbyopic wearers, such as single-vision ophthalmic lenses. The lenses exhibit reduced distortion as perceived by the wearer.
Claims15
1-11. (canceled)
An ophthalmic lens configured to correct a wearer's eye vision in compliance with a desired value of optical power and/or a desired value of astigmatism, wherein the wearer's eye is non presbyopic, wherein the ophthalmic lens comprises:
- an eye-side surface positioned closest to the wearer's eye when the ophthalmic lens is worn by the wearer in given wearing conditions;
- an object-side surface positioned opposite to the eye-side surface in the wearing conditions:
- a first optical portion having in the wearing conditions a first optical power P1;
- a second optical portion having in the wearing conditions a second optical power P2;
- wherein:
- the first optical portion corresponds in the wearing conditions to a first zone of the object-side surface, wherein the first zone has a mean curvature value MCURV1;
- the second optical portion corresponds in the wearing conditions to a second zone of the object-side surface, wherein the second zone has a mean curvature value MCURV2;
- wherein P1<P2 and MCURV2<MCURV1, and
- wherein
- the second optical portion is mainly located in a central, temporal, bottom or top part of the lens when the first optical portion is mainly located in a nasal part of the lens, and
- the second optical portion is mainly located in a temporal, bottom or top part of the lens when the first optical portion is mainly located in a central part of the lens.
8 more elements
Dependencies are inferred from the claim text.