This computer-implemented method for providing a finished single vision ophthalmic lens intended for a wearer, from a target lens having at least one complex surface, the finished lens having a rotationally symmetrical front surface, includes: providing wearer data or theoretical data; defining targeted optical or geometrical characteristics along a predetermined path on the target lens, based on the wearer data or on the theoretical data; determining the finished lens by: selecting an initial lens complying with the prescription data and having a rotationally symmetrical front surface and a predetermined curvature at a prescription reference point; defining a current lens as the initial lens; modifying a front surface definition of the current lens to reach the targeted optical or geometrical characteristics until an ending criterion is met; providing the finished lens as the current lens.

A method of compensating for a refractive error, including manipulating eyelashes to project into a line of sight of an eye at least when an eyelid from which the eyelashes extend is partially closed or when the eye is moved relative to the eyelid. The method may further include manipulating at least one of spacing, orientation, direction, contour or shape of the eyelashes to create an optical effect that improves visual acuity when the eyelashes project into the line of sight and training an individual whose eyelashes are manipulated to position the eyelid from which the eyelashes extend, the eye or both the eyelid and the eye from which the eyelashes extend to achieve relative positioning of the eye and the eyelid to obtain the optical effect that improves visual acuity when desired.

A design system of a progressive addition lens including a near portion for viewing a near distance, a distance portion for viewing a distance farther than the near distance, and an intermediate portion provided between the near portion and the distance portion and having a progressive refraction function, the design system of a progressive addition lens includes an aberration amount setting unit that sets an amount of transmission astigmatism Δ.sub.β[D] added to a progressive addition lens in such a way that when a wearer of the progressive addition lens α to which transmission astigmatism of an aberration amount Δ.sub.α[D] is added is provided with the progressive addition lens β having different parameters, visual performance when the progressive addition lens β is worn approaches visual performance when the progressive addition lens α is worn.

An ophthalmic lens includes a hybrid plano-convex refractive lens body having a convex portion and a planar portion. A metasurface array can be associated with the planar portion and include an arrangement of metasurface building elements dimensioned from an optical wavelength. The metasurface building elements can be configured across the lens body to define an optical characteristic of the ophthalmic lens. The arrangement of metasurface building elements can include meta-atoms that are configured to induce a polarization-dependent focusing of light received by the ophthalmic lens. A shape of the meta-atoms of the array can be determined based on a function of the ophthalmic lens, including glare/halo reduction. The meta-atoms can be formed as canonical and/or freeform shapes.

A photochromic ophthalmic lens may comprise a main body comprising an optical zone and a peripheral zone disposed adjacent the optical zone, wherein one or more of the optical zone and the peripheral zone comprises a photochromic dye, wherein the ophthalmic lens has a thickness profile that is configured based on cosmetic appearance associated with a target level of transmission (% T), and wherein at least a portion of the thickness profile is the same across two or more stock keeping units (SKU), each of the two or more SKU having a different target prescription.

A progressive ophthalmic lens adapted to a wearer in given wearing conditions having an addition and fulfilling an acuity performance criterion determined by: defining a set of at least three different vision distances including at least a first vision distance greater than or equal to 4 m, a second vision distance greater than or equal to 0.6 m and smaller than or equal to 2 m and a third vision distance smaller than or equal to 0.5 m, each vision distance being associated with an acuity loss threshold value and an acuity area threshold value, providing an acuity model defining acuity loss as a function of lens power and resulting astigmatism, determining of each vision distance using the acuity model the area of gaze directions for which the acuity loss is below the associated acuity loss threshold value.

A system of contact lenses includes at least two contact lenses, each lens having a visual correction for a non-rotationally symmetric eye aberration. Each lens has a different level or degree of a stabilization that is characterized by a thickness differential between a thickness of a stabilization zone and a thickness of a non-stabilization zone.

The present disclosure relates to trial scleral lenses, and the resulting scleral lenses, designed for the asymmetric shape of the sclera and/or its chiral properties. In some embodiments, the scleral lenses are also designed for the specific asymmetry associated with different scleral diameters. In addition, as discussed herein, the scleral shape can vary with different conditions of the eye. By designing a set of trial scleral lenses that takes into account these different asymmetric properties of the sclera, a clinician can be more efficient, fitting more eyes with fewer subsequent modifications. The resulting lenses will also achieve a better fit.

Method implemented by computer for optimizing a set of optical lens blanks used to manufacture a set of optical lenses, each optical lens comprising first and second optical surfaces, the first and second optical surfaces being connected by a external periphery surface, the method comprising: a data providing step during which a set of data for every optical lens of the set of optical lenses is provided, the data comprising at least contour data representative of an external periphery surface of the optical lens, a first dataset representative of the first optical surface of the optical lens and a second dataset representative of the second optical surface of the optical lens; a supply cost function providing step during which a supply cost function is provided, the supply cost function being a function of the number of different optical lens blank comprised in the set of optical lens blanks.

A system of contact lenses includes at least two contact lenses, each lens having a visual correction for a non-rotationally symmetric eye aberration. Each lens has a different level or degree of a stabilization that is characterized by a thickness differential between a thickness of a stabilization zone and a thickness of a non-stabilization zone.