公开(公告)号：US12228804B2

公开(公告)日：2025-02-18

申请号：US18081718

申请日：2022-12-15

Applicant: CooperVision International Limited

Inventor： Martin Webber ,  Arthur Bradley ,  Baskar Arumugam ,  David S. Hammond ,  Paul Chamberlain

IPC: G02C7/04 ,  G02C7/06

Abstract: A contact lens (201) and methods of manufacturing such a lens are described. The lens (201) includes an optic zone (202). The optic zone (202) comprises a central region (205), the central region (205) having a first optical axis (219), a base radial curvature power, a base radial sagittal power, and a centre of curvature that is on the first optical axis (219). The optic zone (202) comprises an annular region (203), wherein at a point halfway across the width of the annular region (203) the annular region (203) has a radial curvature power of X, wherein X is greater than the base radial curvature power. The annular region (203) has an off-axis centre of curvature that is a first distance from the optical axis (219) such that, at a point halfway across its width, the annular region (203) has a sagittal power of Y, wherein Y is greater than the base radial sagittal power, and wherein Y is less than X.