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US 11,378,818 B2Granted
Lens element
AssigneeEssilor International
InventorsMatthieu Guillot, Björn Drobe
Life of this patent
Estimating the term…
Abstract
A lens element worn in front of an eye of a person includes a refraction area having a first refractive power based on a prescription for correcting an abnormal refraction of the eye of the person and a second refractive power different from the first refractive power and a plurality of at least three optical elements, at least one optical element having an optical function of not focusing an image on the retina of the eye so as to slow down the progression of the abnormal refraction of the eye.
Claims20
A lens element comprising:
- a refraction area having a refraction power based on a prescription corresponding to an eye of a person;
- and
- at least three optical elements,
- wherein the at least three optical elements are configured so that along at least one section of the lens element, a mean sphere of the at least three optical elements varies from a first point of the at least one section towards a peripheral part of the at least one section, wherein at least one optical element of the at least three optical elements is a micro-lens, and
- wherein the mean sphere is defined as SPHmesh=½(SPHmin+SPHmax), where SPHmin and SPHmax are minimum and maximum spheres respectively.
2 more elements
A lens comprising:
- a first area having a refraction power based on a prescription corresponding to an eye of a wearer;
- and
- a second area having at least three optical elements,
- wherein the at least three optical elements are configured so that a mean sphere at a first one of the at least three optical elements is different from a mean sphere at a second one of the at least three optical elements, the first one of the at least three optical elements being farther from a periphery of the lens than the second one of the at least three optical elements, wherein at least one of the at least three optical elements is a micro-lens, and
- wherein the mean sphere is defined as SPHmesh=½(SPHmin+SPHmax), where SPHmin and SPHmax are minimum and maximum spheres respectively.
2 more elements
Dependencies are inferred from the claim text.