Abstract: The present disclosure relates to darkening filters 10, 10? which are suitable for selectively darkening an optically transmissive window 20 for protection from light, in particular from high intensity light. The darkening filter 10, 10? is mounted in a forward-facing optically transmissive window 20 and comprises a non-uniform pattern 30 of switchable shutters 32 capable of being switching to at least a dark state and a light state by a shutter control system 40. The present disclosure also relates to a method of operating such darkening filters 10, 10?. The present disclosure furthermore relates to vision-protective headgears 100, 100?, welding shields 110 and panes 120 comprising the darkening filters 10, 10? according to the present disclosure.

Abstract: A convergence-reducing lens, wherein a central normal defines a z-axis, and a central region defines an x-y plane, together defining an x-y-z coordinate system, the convergence-reducing lens comprising a distance-vision region with a negative distance-vision optical power, having a distance-vision front surface with a center of distance-vision front curvature, and a distance-vision rear surface with a center of distance-vision rear curvature; and a near-vision region with an optical power within 0.

Abstract: Provided is a sheet glass production process for properly producing sheet glass having a convex shape in section in a width direction orthogonal to the advancing direction of a glass ribbon. A glass ribbon G2 advancing on molten metal 22 is heated so as to have both edge portions G2B heated more intensely than a central portion G2A in a width direction thereof in an upstream zone of the molten metal bath, and a plurality of rolls 23 are rotated in contact with both edge portions G2B of the glass ribbon G2 such that upstream rolls 23A in an advancing direction F1 have a lower peripheral speed than downstream rolls 23B in the advancing direction.

Abstract: Systems and methods for creating and/or manufacturing progressive lenses (e.g., bifocal, multifocal, and so on) having ocular side (e.g., back side or surface) lens segments, are described. For example, the systems and methods may apply round lens segments to ocular sides or surfaces of progressive lenses, providing the lenses with specializing vision lens segments and/or power enhancement lens segments, which may combine with front surface power additions provided by the multifocal lens segments applied to the front surfaces of the lenses.

Abstract: The present invention relates to light-emitting diode glasses, a control system for multiple light-emitting diode glasses, and a control method therefor. The light-emitting diode glasses according to the present invention comprise: a glasses frame comprising a pair of leg frames and a front frame which is connected to one end of each of the pair of leg frames and has a plurality of light-emitting diodes provided thereon; a memory unit which is provided on the glasses frame and has one or more items of first pattern data stored therein; a communication module for communicating one or more items of second pattern data with a control terminal unit; and a control unit, provided on the glasses frame, for controlling the operation of the light-emitting diodes so that the first pattern data or the second pattern data are displayed via the light-emitting diodes.

Abstract: One or more peripheral optical elements direct light emanating from a central field portion of a visual field (via one or more central optical elements of a visual sensor) onto a peripheral sensor portion of the visual sensor. The peripheral optical element(s) map an image of the central field portion onto the peripheral sensor portion for detection by the visual sensor. The central optical element(s) define the central field portion and form (from light emanating from the central field portion and directly incident on the central optical element(s)) an image of the central field portion on a corresponding central sensor portion of the visual sensor distinct from the peripheral sensor portion.

Abstract: The invention provides an ophthalmic lens comprising one or more oblique prismatic component, wherein the lens slows myopia progression and/or treats or prevents myopia or a disease or condition associated with myopia. The one or more oblique prismatic components may be base-down or base-down and base-in or base up and base-in. The one or more oblique prismatic components may be central and/or in a distance and/or near zone of the ophthalmic lens. The invention also provides an ophthalmic lens comprising a central base-down prism in a distance zone wherein the lens slows myopia progression and/or treats or prevents myopia or a disease or condition associated with myopia. Also provided is an optical device comprising one or more ophthalmic lenses and a method of slowing myopia progression and/or treating or preventing myopia or a disease or condition associated with myopia including using one or more ophthalmic lenses.

Abstract: The invention relates to a method, a system and a computer program product, in particular for designing or producing a lens having a prismatic effect, and to a lens having a prismatic effect. Said method consists of the following steps: individual data of the spectacle wearer is obtained, said individual user data comprising prismatic prescription data; the prismatic lens is designed taking into account the individual user data; centration data for the prismatic lens is determined in accordance with the prismatic prescription data.

Abstract: The invention is directed to a method for making a spectacle lens for a non-presbyopic person wherein the spectacle lens is a ready-to-wear lens and has at least one zone having an optical effect to reduce vision stress. In the method, at least one of the following is provided: the contour of the ready-to-wear spectacle lens and one or several visual points whereat the person looks through the ready-to-wear spectacle lens for one or several visual tasks in the near range. This method step is followed by setting at least one of: a design reference point of the zone, the extent of the zone, the optical effect within the zone based on the provided contour, and the visual points. The spectacle lens is then made with this zone.

Abstract: A lens element for progressive spectacles. The lens element has at least one near viewing zone and a distance viewing zone which have different focusing powers. Further, the lens element has a predetermined prismatic power. Furthermore, a vertical component of the predetermined prismatic power is realized at a first point of the lens element, and a horizontal component of the predetermined prismatic power is realized at a second point of the lens element. The present invention also relates to a method for producing a lens element.

Abstract: In a progressive-addition lens having a progressive surface on one side and an aspherical or atoroidal surface on the other side, the lens shape is designed so that a high degree of aberration correction can be carried out on the periphery of the lens and the distance power and addition power of the lens acting on the eye of a wearer substantially correspond to the distance power and addition power measured by a lens meter. A progressive-addition lens includes a progressive surface and an aspherically designed surface formed of an aspherical or atoroidal surface, and the reference point of the aspherically designed surface is located in the vertical direction of the lens below a prism reference point of the progressive surface and above a near design reference point.

Abstract: Disc designed to be attached to a concave curved surface of an optical component to modify an optical power of said component, the disc comprising a Fresnel lens made up of a series of Fresnel regions of spherical general shape, in which the changes of height between successive Fresnel regions are located on a concave face of the disc, and in which said Fresnel regions are made out in a special distribution. A disc of this kind maintains the dioptric quality without introducing distortions.

Abstract: The invention generally relates to a lens and the method of manufacturing progressive addition lenses (PAL) to remove unwanted base out prism and minimize excessive convergence, comprising determining basic configuration of two major lens surfaces to provide a distance portion and near portion, wherein diopter power increases from the distance portion of the lens to the near portion; selecting an amount of prism reduction; and reducing base out prism that inherently occurs as diopter power increases by altering the configuration of the lens as a function of the amount of prism reduction to minimize any disruption of optical properties a lens while decreasing base out prism.

Abstract: A disk enabling modification of the power of an optical component consists of a Fresnel lens. The disk is initially formed with a general rounded shape which corresponds to the shape of the optical component. In this way, the disk does not lose its shape or does not lose it very much when it is applied against the component. It does not cause image distortion or optical aberration when an object is observed through the component provided with the disk. Such a disk is particularly adapted to obtain correction of ametropia or to a solar mask initially lacking optical power.

Abstract: A variable focus lens system for eyeglasses is disclosed. The system consists of superimposed first and second thin lenses, simulating Alvarez lenses, with one side of each lens divided into Fresnel zones and zone boundaries. The second lens element is slidable for focus adjustment. The Fresnel zone boundary surfaces are made parallel to the user's optical line of sight to reduce visual obstructions, and the zone boundaries may be restricted to areas near the lens periphery to further reduce visual obstructions. The Fresnel zone boundaries may follow paths which enable equal, constant step size for the boundaries along their lengths. An opaque light absorbing coating may be applied to the zone boundaries to reduce light scattering. A fixed prescription lens, having the user's distance and astigmatism corrections, is superimposed on the first and second lens elements.