Ophthalmic lenses and methods relating thereto

A method of manufacturing an ophthalmic lens, the method comprising:

• providing a spherical aberration power profile, the spherical aberration power profile being the variation in radial slope power for an eye, as a function of radial distance from an optical axis of the eye, slope power at a location being determined by a slope of a wavefront after the wavefront has passed through an optical surface divided by the radial distance of the location from the optical axis;
• providing a target radial slope power profile for a lens wearer, the target radial slope power profile being the target variation in radial slope power as a function of radial distance from an optical axis of the eye of the lens wearer, wherein the target radial slope power profile includes a central region having a distance corrective radial curvature power, curvature power being determined by a local curvature of an optical surface, and a first annular region that provides a radial curvature add power having a greater radial curvature add power than the central region;
• subtracting the spherical aberration power profile from at least the central region of the target radial slope power profile, thereby providing a corrected radial slope power profile for an ophthalmic lens, wherein the central region has a radial slope power profile that increases with increasing radial distance from the optical axis, wherein the gradient of the radial slope power profile across the central region increases with increasing radial distance from the optical axis, following a first curve;
• wherein the first annular region has a radial slope power profile that increases with increasing radial distance from the optical axis, wherein the gradient of the radial slope power profile across the first annular region increases with increasing radial distance from the optical axis, following a second curve, and wherein the radial slope power increases across the radial width of the first annular region from a first value that lies below the first curve, to a second value that is greater than the first curve;
• and
• manufacturing an ophthalmic lens having the corrected radial slope power profile.