US Patent 10908434 Negative power lens with off-axis curvature center

A convergence-reducing lens, wherein a central normal defines a z-axis, and a central region defines an x-y plane, together defining an x-y-z coordinate system, the convergence-reducing lens comprising a distance-vision region with a negative distance-vision optical power, having a distance-vision front surface with a center of distance-vision front curvature, and a distance-vision rear surface with a center of distance-vision rear curvature; and a near-vision region with an optical power within 0.5 D of the distance-vision optical power, having a near-vision front surface with a center of near-vision front curvature, and a near-vision rear surface with a center of near-vision rear curvature; wherein at least one of an x-coordinate of the center of near-vision front curvature is nasal relative to an x-coordinate of the center of distance-vision front curvature, and an x-coordinate of the center of near-vision rear curvature is temporal relative to an x-coordinate of the center of distance-vision rear curvature.