An ophthalmic lens having a front face having a front power and a back face having a back power, the ophthalmic lens having a prescription resulting from the combination of the front and back powers, the back face presenting Fresnel rings and the ophthalmic lens having a transmittance of visible light smaller than 80%. Furthermore, a semi-finished blank from which the ophthalmic lens can be manufactured, a method for manufacturing an ophthalmic lens, a system for the execution of the method, and a computer-readable storage medium comprising program instructions for performing the method.

An eye-mountable device is provided that includes electronics encapsulated within a rigid, gas-permeable polymeric material. The eye-mountable device includes an electroactive lens that can be operated to control an overall optical power of the eye-mountable device to restore an amount of visual accommodation of an eye to which the device is mounted. A method for fabricating the eye-mountable device is provided that includes applying an adhesive to secure lenses of the electroactive lens together and to maintain an amount of liquid crystal in the space between the lenses. The rigid, gas-permeable polymeric material can then be formed around the electroactive lens, electronics, or other elements of the eye-mountable device. The rigid, gas-permeable polymeric material can be mountable to a corneal surface of an eye or can be disposed on or within a soft polymeric material that is mountable to the corneal surface of the eye.

Disclosed is a method for testing the feasibility of a pair of spectacles, the pair of spectacles comprising an identified spectacle frame. The method includes steps of: a) acquiring a range of values of at least one first parameter relating to a spectacle wearer, in all of which range it is desired to ensure the feasibility of the pair of spectacles, b) acquiring a range of values of at least one second parameter that relates to a spectacle wearer and that is different from each first parameter, in all of which range it is desired to ensure the feasibility of the pair of spectacles, c) confirming, for a characteristic number of values of each second parameter, that the pair of spectacles is feasible whatever the value of each first parameter comprised in its range.

A target design is produced with a computer-implemented method that takes into consideration an astigmatic effect and is suitable for optimizing a spectacle lens having the astigmatic effect. The method includes providing an initial target design that does not directly take into consideration the astigmatic effect of the spectacle lens, and producing the target design by correcting the initial target design on the basis of a correction target design that directly takes into consideration the astigmatic effect of the spectacle lens.

Method implemented by computer means for optimizing a set of optical lens blanks to be used to manufacture a set of optical lenses, each optical lens comprising a first optical surface, a second optical surface, 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 lens blank cost function providing step during which a lens blank cost function is provided, the lens blank cost function being a function of the price of the optical lens blanks comprised in the set of optical lens blanks, a material cost function providing step during which a material cost function is provided, the material cost function being a function of the quantity of material to be removed from an optical lens blank so as to provide an optical lens adapted to the provided data, a lens blank optimization step during which the number and the contours of the different lens blanks comprised in the set of lens blanks to be used to manufacture the set of optical lenses adapted to the provided data and that minimizes a global cost function is determined, the global cost function being a weighted sum of the supply cost function, the lens blank cost function and the material cost function with the weight of the cost functions different from zero.

A series of spectacle lenses is disclosed, wherein each lens has a spherical front surface and an aspheric, atoric, or freeform back surface. Further, each lens of the series provides a focal power P.sub.x between 6 D and +4 D; and at least one lens of the series provides a focal power P.sub.x between at least one of (a) 0.75 D and +2.25 D and (b) 0.5 D and +2.00 D. For an upper range of focal powers, lenses having the same nominal front surface power are provided; and for a lower range of trough powers, lenses having the same minimum nominal back surface power are provided. The spherical front surface has a nominal front surface power P.sub.f and the back surface has a minimum nominal back surface power P.sub.b; wherein 15.5 D|P.sub.f|+|P.sub.b|+|P.sub.x|31.5 D applies for each spectacle lens of the series.

The present invention provides an apparatus for modifying a property of an eyeglass lens. The apparatus includes a transparent polymer film capable absorbing or reflecting UVA and/or UVB radiation. The film is sized and shaped for attachment to a surface the eyeglass lens.

Ophthalmic lenses and methods of manufacture thereof are disclosed. The ophthalmic lenses include metasurface features that define a metasurface array on a lens body. The metasurface array can be tuned to modify an optical property, such as glare reduction, of the ophthalmic lens using an arrangement of metasurface building elements dimensioned from an optical wavelength, including being dimensioned smaller than an optical wavelength. The ophthalmic lenses can be subject to physical manipulation, including rolling or other folding during an installation procedure, and as such, the modified optical property induced by the metasurface array can be maintained after such manipulation. The ophthalmic lenses can be formed using a molding process, in which the metasurface array is associated with a non-solid material and formed into a lens shape with the material.

This invention discloses apparatus for generating an ophthalmic lens with at least a portion of one surface free-formed from a Reactive Mixture. In some embodiments, an ophthalmic lens is formed on a substrate with an arcuate optical quality surface via a source of actinic radiation controllable to cure a definable portion of a volume of Reactive Mixture.

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.