CPC G02C 7/049 (2013.01) [A61F 2/1451 (2015.04); A61F 2/1618 (2013.01); G02C 7/022 (2013.01); G02C 2202/24 (2013.01)] | 10 Claims |
1. A method for improving vision degradation in a contact lens design to slow, retard or prevent myopia progression in a patient, comprising:
providing a contact lens having a myopia correction zone and an annular treatment zone each concentrically positioned around a central axis of said contact lens, said annular treatment zone surrounding said myopia correction zone;
wherein the myopia correction zone is configured to focus light passing therethrough onto said retina along said central axis; and
wherein the annular treatment zone has a surface shape comprising a portion of a toroid that focuses light passing therethrough in a continuous focal ring that surrounds the central axis the lens, wherein the focal ring is positioned in front of the retina; and
wherein vision degradation of said contact lens is improved as compared to a lens having a myopia correction zone and annular treatment zone that both focus light passing therethrough to focal points along said central axis.
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