Coopervision International Limited

David S Hammond

Arthur Bradley

Paul Chamberlain

Baskar Arumugam

Martin Webber

Myhanh Nguyen

An ophthalmic lens () for use in preventing or slowing the development or progression of myopia comprises an optic zone () for focusing light from distant point objects to a focal surface. The optic zone comprises a diffractive lens () for manipulating the longitudinal chromatic aberration properties of the light proximate the focal surface.

Myopia-control contact lenses and methods relating thereto

The present disclosure provides orthokeratology lenses () and methods of manufacturing such lenses (). The orthokeratology lenses () disclosed herein comprise a correction region () for reducing the curvature of a central portion of a cornea, an annular treatment recess () for inducing myopic defocus in a peripheral portion of the cornea and a regulating region () for regulating the myopic defocus induced by the annular treatment recess ().

Orthokeratology contact lenses and related methods

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

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Pleasanton, CA, United States of America

David S Hammond