An ophthalmic multifocal lens, and a method of manufacturing same, at least comprising focal points for near, intermediate and far vision. The lens comprises a light transmissive lens body providing a refractive focal point, and a periodic light transmissive diffraction grating, extending concentrically over at least part of a surface of the lens body and providing a set of diffractive focal points. The diffraction grating is designed to operate as an optical wave splitter, the refractive focal point providing the focal point for intermediate vision and the diffractive focal points providing the focal points for near and far vision. The diffraction grating has an optical transfer function comprising a continuous periodic phase profile function having an argument modulated as a function of the radial distance (r) to the optical axis of the lens body, thereby tuning the light distribution in the focal points.

An optical lens intended to be worn in front of an eye of a wearer having at least one prescribed refractive power Px, the optical lens comprising two opposite optical faces and a plurality of contiguous optical elements at least part of the optical elements having an optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye, wherein: —over a pupil having at least a 4 mm diameter, one can measure in a plane corresponding to the at least one prescribed refractive power along at least one direction, a Modulation Transfer Function through the optical lens greater than 0.1 between 0 and 20 cyc/deg; —a majority of the light rays passing through the optical lens over said pupil pass through at least one of the plurality of optical elements, and —each of the contiguous optical element verifies that Formula (I) with d a characteristic dimension of the contour of said optical element in mm, |P| the absolute value of a characteristic optical power of said optical element expressed in diopter, and K a number greater or equal to 0.9 and smaller than or equal to 1.7.

An optical lens intended to be worn in front of an eye of a wearer having at least one prescribed refractive power Px, the optical lens comprising two opposite optical faces and a plurality of contiguous optical elements at least part of the optical elements having an optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye, wherein: —over a pupil having at least a 4 mm diameter, one can measure in a plane corresponding to the at least one prescribed refractive power along at least one direction, a Modulation Transfer Function through the optical lens greater than 0.1 between 0 and 20 cyc/deg; —a majority of the light rays passing through the optical lens over said pupil pass through at least one of the plurality of optical elements, and —each of the contiguous optical element verifies that Formula (I) with d a characteristic dimension of the contour of said optical element in mm, |P| the absolute value of a characteristic optical power of said optical element expressed in diopter, and K a number greater or equal to 0.9 and smaller than or equal to 1.7.

A diffractive multifocal lens is disclosed, comprising an optical element having at least one diffractive surface, the surface profile comprising a plurality of annular concentric zones. The optical thickness of the surface profile changes monotonically with radius within each zone, while a distinct step in optical thickness at the junction between adjacent zones defines a step height. The step heights for respective zones may differ from one zone to another periodically so as to tailor diffraction order efficiencies of the optical element, in one example of a trifocal lens, step heights alternate between two values, the even-numbered step heights being lower than the odd-numbered step heights. By plotting a topographical representation of the diffraction efficiencies resulting from such a surface profile, step heights may be optimized to direct a desired level of light power into the diffraction orders corresponding to near, intermediate, and distance vision, thereby optimizing the performance of the multifocal lens.

A computer-implemented method for fitting a spectacle lens, which has a first spectacle lens surface, a second spectacle lens surface, and at least one dioptric power to be obtained, to a spectacle frame with a certain frame edge curve is made available. In the method, a free-form surface formed on a first spectacle lens surface is fitted to the frame edge curve of the spectacle frame. The free-form surface is fitted to the frame edge curve by virtue of the free-form surface and the second spectacle lens surface being optimized with regard to minimizing the difference between the free-form surface edge curve and the frame edge curve and with regard to achieving the at least one dioptric power to be obtained with the spectacle lens.

An apparatus having an asymmetric adjustable lens with a deformable optical element. The apparatus may also include one or more actuators coupled to a deformable element of the asymmetric adjustable lens in a direct-drive configuration such that (1) mechanical action of the one or more actuators applies force to the deformable optical element and (2) the force applied by the mechanical action of the one or more actuators changes an optical property of the asymmetric adjustable lens by deforming the deformable optical element. Various other devices, systems, and methods are also disclosed.

An apparatus having an asymmetric adjustable lens with a deformable optical element. The apparatus may also include one or more actuators coupled to a deformable element of the asymmetric adjustable lens in a direct-drive configuration such that (1) mechanical action of the one or more actuators applies force to the deformable optical element and (2) the force applied by the mechanical action of the one or more actuators changes an optical property of the asymmetric adjustable lens by deforming the deformable optical element. Various other devices, systems, and methods are also disclosed.

A spectacle lens includes a first volume element group containing a plurality of first volume elements. The plurality of first volume elements is made from a material with a first Abbe number in the form of grid points of a geometric grid. Further, the spectacle lens includes a second volume group containing a plurality of second volume elements, which form a second partial grid in the form of grid points of a geometric grid, the second volume elements being made of a second material having a second Abbe number, wherein the first Abbe number and the second Abbe number differ from each other. The first partial grid and the second partial grid are arranged offset from each other. The disclosure also relates to a corresponding computer-implemented method for designing a spectacle lens of the type and to a method for producing the type of spectacle lens.

A spectacle lens includes a first volume element group containing a plurality of first volume elements. The plurality of first volume elements is made from a material with a first Abbe number in the form of grid points of a geometric grid. Further, the spectacle lens includes a second volume group containing a plurality of second volume elements, which form a second partial grid in the form of grid points of a geometric grid, the second volume elements being made of a second material having a second Abbe number, wherein the first Abbe number and the second Abbe number differ from each other. The first partial grid and the second partial grid are arranged offset from each other. The disclosure also relates to a corresponding computer-implemented method for designing a spectacle lens of the type and to a method for producing the type of spectacle lens.

A method for evaluating an ophthalmic lens for a given wearer according to a visual performance parameter includes providing wearer's data for the given wearer. The method further includes providing a visual performance parameter tolerance range for the wearer. The method further includes providing an ophthalmic lens to be evaluated, the ophthalmic lens being characterized by opto-geometrical features. The method further includes computing a value of the visual performance parameter for the lens to be evaluated on the basis of a model. The method further includes evaluating the ophthalmic lens by comparing the computed value of the visual performance parameter with the visual performance parameter tolerance range.