Lens for optical treatment
AssigneeThe Hong Kong Polytechnic University
InventorsChi Ho To, Siu Yin Lam, Yan Yin Tse
Life of this patent
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Abstract
A method for treating progression of a refractive disorder in a human eye. The method includes the steps of producing a first image on a retina of the human eye and producing a second image to generate a defocus.
Claims24
A method for retarding the progression of myopia or hyperopia in a human eye, the method comprising:
- (a) providing a Fresnel concentric multi-focal lens comprising primary optical zones having a primary refractive power and secondary optical zones having at least one secondary refractive power;
- and
- (b) correcting the myopia or hyperopia with the primary refractive power and generating at least one defocus with the secondary refractive power,
- wherein the primary optical zones enable near and distant objects to be viewed;
- and the secondary optical zones generate myopic defocus to retard myopia or generate hyperopic defocus to retard hyperopia.
A concentric multi-focus lens for retarding the progression of myopia in a human eye, the lens comprising:
- a first lens side;
- a primary optical zone on the first lens side having a first curvature configured to form a primary refractive power, wherein the primary refractive power is configured to correct the myopia;
- and
- a secondary optical zone on the first lens side having at least one second curvature configured to form at least one secondary refractive power, the at least one second curvature being different and non-continuous relative to the first curvature, wherein the secondary refractive power is configured to generate at least one myopic defocus to retard myopia.
A lens for retarding the progression of myopia in a human eye, the lens comprising:
- a first lens side;
- a primary optical zone on the first lens side having a first curvature configured to form a primary refractive power, wherein the primary refractive power is configured to correct the myopia during usage of the lens;
- and
- a secondary optical zone on the first lens side having at least one second curvature configured to form at least one secondary refractive power,
- wherein the at least one second curvature is different and non-continuous relative to the first curvature,
- wherein the secondary refractive power is configured to generate at least one myopic defocus to retard myopia during usage of the lens, and
- wherein at least part of the secondary optical zone is formed concentrically about at least part of the primary optical zone.
A concentric multi-focus contact lens for retarding the progression of myopia in a human eye, the lens comprising:
- a first lens side;
- a centrally located primary optical zone on the first lens side having a first curvature configured to form a primary refractive power,
- wherein the primary refractive power is configured to correct myopia by generating a focused image in a central optic zone of the human eye during usage of the lens;
- and
- a secondary optical zone on the first lens side having at least one second curvature configured to form at least one secondary refractive power,
- wherein the at least one second curvature is different and non-continuous relative to the first curvature,
- wherein at least part of the second optical zone is concentrically located about at least part of the centrally located primary optical zone, and
- wherein the secondary refractive power is configured to generate at least one defocused image in the central optic zone of the human eye at a spaced distance from the focused image during usage of the lens to retard myopia.
Dependencies are inferred from the claim text.