Coopervision International Limited

Martin Webber

Arthur Bradley

Paul Chamberlain

Baskar Arumugam

Percy Lazon De La Jara

David S Hammond

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

A contact lens for use in preventing or slowing the development or progression of myopia, and methods of manufacturing and using such a lens. The optic zone of the lens comprises a central region having a curvature providing a base power. The optic zone comprises an annular region circumferentially surrounding the central region. The annular region comprises a treatment zone having a characteristic that reduces the contrast of an image of an object that is formed by light passing through the central region and the treatment zone compared to an image of an object that would be formed by light passing through only the central region. The characteristic that causes the contrast reduction varies with meridian around the annular region. A peripheral zone surrounding the annular region has a constant thickness profile in every meridian or a variation in thickness configured to promote rotation of the lens.

Methods of increased contact lens rotation

A multifocal ophthalmic lens wherein a first surface of the lens is shaped to form a surface power map and a second surface of the lens is shaped to form a second surface power map. The first surface power map and the second surface power map together form a lens power map. The first surface power map, the second surface power map, or the lens power map comprises a spiral. The spiral has a variation across at least a portion of the lens. Methods of making and using such lenses are also provided.

Multifocal ophthalmic 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.

Contact lenses and methods relating thereto

A multifocal ophthalmic lens has a surface that varies across at least a portion of the lens to form a surface power map. The surface power map comprises a spiral, with a power that varies substantially periodically both radially outwards from and angularly about an optical axis of the lens. A period of the radial variation is greater than 100 microns and a period of the angular variation is greater than 6 degrees. Methods of making and using the multifocal ophthalmic lens are also described.

Multifocal ophthalmic lens and related methods

A contact lens for use in preventing or slowing the development or progression of myopia, and methods relating thereto, are described. The lens includes an optic zone comprising a central region having a first optical axis, and a curvature providing a base power, and centred on a centre of curvature that is on the first optical axis. The optic zone comprises an annular region, wherein the annular region surrounds the central region. The annular region comprises at least one maximum add power meridian having a curvature providing a maximum add power, and centred on a centre of curvature that is a first distance from the first optical axis. The annular region comprises at least one intermediate add power meridian, having a curvature providing an intermediate add power of between zero dioptres of add power and the maximum add power, and centred on a centre of curvature that is a different distance from the optical axis than the first distance.

An ophthalmic lens for myopia control. A first surface of the lens varies across the lens to form a first surface power map. A second surface of the lens varies across the lens to form a second surface power map. Each of the first and second surface power maps comprise a spiral. The spirals formed by the first and second surface power maps twist in opposing directions. Related methods are also described.

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Southampton, United Kingdom

Martin Webber