A method for determining an ophthalmic element adapted to a wearer, the wearer having a prescription. The method including at least providing an initial set of ophthalmic elements, each ophthalmic element of the initial set being adapted to the prescription of the wearer, for each ophthalmic element of the initial set, calculating a value of each criterion of a plurality of criteria, the plurality of criteria comprises a plurality of lens criteria and/or a plurality of wearer criteria, generating an optimal set of ophthalmic elements by computing pareto-optimal ophthalmic elements among the ophthalmic elements of the initial set based on the value of each criterion, and determining one final ophthalmic element for the wearer in the optimal set of ophthalmic elements based on selected criteria based on wearer's preferences.

Disclosed is a method implemented by computer for determining a lens blank intended to be used for the manufacturing of a finished optical article. The method includes: —a virtual volume data determining step, during which virtual volume data are determined based at least on finished optical article data representative of the volume of the finished optical article and over-thickness data representative of over-thickness requirements, the virtual volume data are determined so that the virtual volume defined by the virtual volume data includes the volume of the finished optical article volume of the finished optical article and the over-thickness, —a lens blank determining step, during which a lens blank is determined based on the virtual volume data so as to include the virtual volume defined by the virtual volume data.

A designing method of a pair of spectacle lenses, which includes a right-eye spectacle lens and a left-eye spectacle lens, includes a process of designing the pair of spectacle lenses; a power error (unit: diopter (D)) that compensates for a difference between a response of accommodation of a right eye and a response of accommodation of a left eye of a wearer, wherein a response of accommodation (unit: diopter (D)) of each eye is a difference AC (=applied accommodation ACN−applied accommodation ACF) between an applied accommodation ACF of the eye of the wearer exhibited when the wearer views an object at a distance f and an applied accommodation ACN of the eye of the wearer exhibited when viewing an object at a distance n shorter than the distance f.

Method for calculating or optimizing a spectacle lens, including specifying at least one surface for the spectacle lens to be calculated or optimized; determining the course of a main ray through at least one visual point of the at least one surface; determining a first primary set and a second primary set of coefficients of the local aberration of a local wavefront; specifying at least one function which assigns a second secondary set of coefficients to a second primary set of coefficients, said second secondary set of coefficients defining the higher-order aberration of a propagated wavefront; determining a higher-order aberration of a local wavefront propagated starting from the at least one visual point along the main ray depending on at least the second primary set of coefficients on the basis of the specified function; and calculating or optimizing the at least one surface of the spectacle lens based on the determined higher-order aberration of the propagated local wavefront.

A method for providing a personalized optical system for a wearer wherein the optical system characterizes a spectacle ophthalmic lens comprising the following steps: a) providing a visual performance level (VPL) value of at least one eye of the wearer; b) providing a set of rules linking at least the visual performance level of step a) with at least one optical criterion chosen among one or both of the two following optical criteria groups consisting of central vision optical criterion (CVOC) group and peripheral vision optical criterion (PVOC) group; c) calculating the physical and geometrical parameters of the personalized optical system or selecting the personalized optical system in an optical systems data base comprising a plurality of optical systems, so that to meet the set of rules of step b) according to the visual performance level data provided in step a).

A method of designing a multifocal ophthalmic lens with one base focus and at least one additional focus, capable of reducing aberrations of the eye for at least one of the foci after its implantation, comprising the steps of: (i) characterizing at least one corneal surface as a mathematical model; (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model; (iii) modelling the multifocal ophthalmic lens such that a wavefront arriving from an optical system comprising said lens and said at least one corneal surface obtains reduced aberrations for at least one of the foci. There is also disclosed a method of selecting a multifocal intraocular lens, a method of designing a multifocal ophthalmic lens based on corneal data from a group of patients, and a multifocal ophthalmic lens.

An improved method for configuring progressive ophthalmic lenses is disclosed. The method includes computing an improved merit function that modulates reduction of peripheral values of the mean sphere according to the prescription sphere. According to the method the amount of reduction of mean sphere of the lens peripheral regions is dependent on the prescription resulting from a modified merit function. As such, the reduction of peripheral mean sphere varies based on the prescription. According to the modified merit function and resulting improved merit function, the greater the hyperopia and/or presbyopia defined in a prescription, the smaller the reduction of the peripheral value of mean sphere. Accordingly, when the peripheral mean sphere reduction is relaxed, a near region is made wider.

A method for manufacturing a diffractive multi-focal ophthalmic lens capable of generating at least three focal points in an optical axis direction using a diffractive structure comprising a plurality of zones in a concentric circle form. A composite profile is generated by overlapping at least two starting profiles comprising a plurality of zones in a concentric circle form, and an adjusted profile is generated in which at least one of phase and amplitude is adjusted by employing a zone of the composite profile as a subject in order to set an intensity distribution in the optical axis direction and determine optical characteristics, to manufacture the diffractive multi-focal ophthalmic lens for which the adjusted profile is provided in at least a portion of the diffractive structure.

A spectacle lens is provided belonging to a series of spectacle lenses having each of first refractive power and second refractive power in common, where a progressive region length, which is a length along a meridian within a progressive region, is shorter than a predetermined reference spectacle lens belonging to the series of spectacle lenses, and a designed maximum differential value where a normalized addition refractive power distribution in the progressive region is differentiated is caused to be close to a reference maximum differential value where a normalized addition refractive power distribution in the progressive region of the reference spectacle lens is differentiated.

The embodiments disclosed herein include improved toric lenses and other ophthalmic apparatuses (including, for example, contact lens, intraocular lenses (IOLs), and the like) that includes one or more refractive angularly-varying phase members, each varying depths of focus of the apparatus so as to provide an extended tolerance to misalignments of the apparatus. Each refractive angularly-varying phase member has a center at a first meridian (e.g., the intended correction meridian) that directs light to a first point of focus (e.g., at the retina of the eye). At angular positions nearby to the first meridian, the refractive angularly-varying phase member directs light to points of focus of varying depths and nearby to the first point of focus such that rotational offsets of the multi-zonal lens body from the center of the first meridian directs light from the nearby points of focus to the first point of focus.