Abstract: A lens for correcting astigmatism, possibly of ocular type, shaped so as to reduce the aberrations caused by accidental displacements with respect to the ideal correction position, in particular so as to ensure satisfactory performance even when rotated with respect to the ideal axis thereof.

Abstract: A contact lens for application in practice of orthokeratology on an eye, including a curved shell having a concave surface and a convex surface. The concave surface includes a carrier zone and a back shaping zone, the back shaping zone having a first curvature and the carrier zone having at least one second curvature. The curved shell has a geometric center and the back shaping zone has a shaping zone center and the back shaping zone center is offset peripherally from the geometric center. The curved shell can have an overall diameter that approximates a corneal limbal diameter of the eye to which the contact lens is to be applied.

Abstract: A computer-implemented method for providing a lens shape for an ophthalmic lens is disclosed. Further, there is provided a method for angular smoothing of a surface determined by carrier lines radially outwards of a prescription zone bordered by a first boundary line. In addition, there is provided an ophthalmic lens, in particular, a spectacle lens. Moreover, a method for minimizing the difference in thickness between two ophthalmic lenses for the same spectacles is provided. A computer program product and a machine-readable storage medium are provided as well.

Abstract: In a contact lens for corrected-cornea crosslinking, a relief region constituted by a concave portion and a pressing region constituted by a convex portion are formed on a side of the lens in contact with a cornea of a patient. When these regions are pressed to the cornea to change a shape thereof, and a curvature of the concave curved-surface to be formed on the cornea is defined as R0 and a curvature of the convex curved-surface of the pressing region is defined as Rs, Rs is set, for example for correcting myopia, to satisfy Rs=R0+5.0 D to R0+10.0 D. When the contact lens having such a configuration is used for correcting the cornea and fixing the corrected state by crosslinking, the shape of the cornea can be accurately formed.

Abstract: A lens configured for implantation into an eye of a human can include an optic including transparent material. The optic can have an anterior surface and a posterior surface. The anterior surface can be convex and the posterior surface can be concave such that the optic is meniscus shaped. Each of the convex anterior surface and the concave posterior surface can have a surface vertex. The optic can have an optical axis through the surface vertices and a thickness along the optical axis that is between about 100-700 micrometers. The lens can also include haptic portions disposed about the optic to affix the optic in the eye when implanted therein. The anterior and posterior surfaces can include aspheric surfaces.

Abstract: A toric lens includes a first surface, a second surface, two first sector zones, and two second sector zones. The first surface and the second surface are opposite to each other. Each of the first sector zones has a first curvature on the first surface along a radial direction of the toric lens, and the first curvature is constant along an arc direction of the toric lens. The two second sector zones are alternately arranged with the two first sector zones. Each of the second sector zones has a second curvature on the first surface along the radial direction, and the second curvature is constant along the arc direction. The first curvature is steeper than the second curvature.

Abstract: A method for determining a semi-finished lens blank, including the steps of: determining, for a given material, a set of faces (S1, S2, . . . Sn) to be defined for a line of ophthalmic lenses, each face (Si, Sj) being defined for a corresponding subset (SEi, SEj) of wearer data and/or frame data; determining, for each face (Si, Sj), a minimum thickness requirement (EnvSi, EnvSj) necessary to produce all the lenses of the corresponding subset (SEi, SEj); determining combinations of two faces (Si, Sj) to be paired; defining a “double-faced” semi-finished lens blank (SF(ij)) consisting of two paired defined faces (Si and Sj) and including the minimum thickness requirements (EnvSi and EnvSj) respectively determined for the faces, in a manner that allows producing all the lenses of the subsets (SEi and SEj) corresponding to said faces.

Abstract: Multifocal contact lenses and methods and uses are described. The multifocal contact lenses include an optic zone. The optic zone has an aspheric power profile that provides a near vision refractive power and a distance vision refractive power, and provides an Add power that corresponds to the difference between the near vision refractive power and the distance vision refractive power. The multifocal contact lenses can improve binocular vision of presbyopic subjects by being prescribed such that the non-dominant eye contact lens is over-corrected for distance vision, and both multifocal contact lenses are under-corrected for the Add power requirement of the subject. Batches and sets of multifocal contact lenses are also described.

Abstract: Translating, multifocal contact lens pairs with optical power zones which are dissimilar between the first and second lenses of the pair are utilized for correcting presbyopia in the wearer. Each lens may differ in segment height, power, asphericity, shape, orientation and/or inset of the optical power subzones thereby providing clear and comfortable vision at far, intermediate and near distances.