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US 7,506,983 B2Granted
Method of optical treatment
AssigneeThe Hong Kong Polytechnic University
InventorsChi Ho To, Siu Yin Lam, Shau Kei Wan
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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.
Claims6
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.
2 more elements
Dependencies are inferred from the claim text.