Abstract: Information is stored in an optical element in the form of a glass or plastic body embodied as spectacles lens, spectacles lens blank or spectacles lens semi-finished product. The information in the form of data is stored on or in the glass or plastic body by creating at least one marking with a marking system. The marking can be read by a reading apparatus. The marking system has an interface for reading information individualizing the optical element. The marking is created permanently by the marking system on or in the optical element at a definition point of a local body-specific coordinate system set by two points on or in the optical element. In this body coordinate system, the manufacturer specifies the position of the lens horizontal and/or the far and/or the near and/or the prism reference point.

Abstract: An apparatus and a method for introducing an optical lens into a turning device are disclosed. The apparatus includes a carrier body and a carrier element for receiving the lens. The carrier element is arranged in the carrier body. The carrier element has a supporting surface for receiving the lens and is displaceably mounted in relation to the carrier body.

Abstract: 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.

Abstract: A method and a device allow to determine the contrast sensitivity threshold of the eyes of a user in an automatic manner without requiring an experienced examiner or active attention of the user. The method includes: a) providing a dataset of track data including data of eye movements, wherein the eye movements are stimulated to elicit an optokinetic nystagmus in the eyes of the user and wherein the track data are related to a particular contrast and spatial frequency of the stimulus; b) estimating at least one velocity component of the eye movement; c) comparing the velocity component with a velocity threshold; d) comparing a fraction of the track data which exceed the velocity threshold with a fractional threshold for the dataset, which is classified as eliciting the optokinetic nystagmus at the particular contrast of the stimulus; and e) determining the contrast sensitivity threshold of the eyes of the user.

Abstract: Centration parameters for fitting spectacle lenses to a predetermined spectacle frame and to the head of a subject are determined with a computer-implemented method. At least two calibrated images, recorded from different recording directions, of the head of the subject wearing the spectacle frame are provided, wherein geometric parameters are established by geometric position determination. The geometric parameters describe the position of the eyes and the geometry of the spectacle frame, and the centration parameters are calculated from the geometric parameters. Further, a three-dimensional model for the spectacle lenses, which are to be received in the spectacle frame, is fitted to the geometry of the geometric parameters that describe the geometry of the spectacle frame.

Abstract: Methods and apparatuses for joint determination of accommodation and vergence of at least one eye of a user are disclosed. The joint determination includes determining an accommodation of the eye of the user and ascertaining values for checking myopia of the eye by presenting a sign at a first distance in front of the eye to stimulate the accommodation of the eye; capturing an eye movement; ascertaining a refraction of the eye with the accommodation of the eye at the first distance; and joint determination of accommodation and vergence of the eye by ascertaining a change in the refraction of the eye with the accommodation of the eye at the first distance in relation to the accommodation of the eye at a second distance; and ascertaining the vergence of the eye from the eye movement of the eye with the accommodation of the eye at the first distance.

Abstract: Methods and devices for correcting centering parameters and/or an axial position of a spherocylindrical refraction on the basis of a habitual head position are disclosed. A representation of the head of a user in a head posture or a representation of the head with a spectacle frame in a spectacle frame alignment are displayed. To correct the spectacle parameter based on a corrected head posture and/or a corrected spectacle frame alignment, the corrected head posture and/or the corrected spectacle frame alignment is determined by at least partially manually correcting a head posture in the displayed representation of the head and/or of the spectacle frame alignment in the displayed representation of the head with the spectacle frame. A representation of the head of a user is shown on a display, thereby allowing intuitive adjustment of a habitual head position.

Abstract: A selection aid for selecting lenses for spectacles on the basis of a plurality of customer-specific criteria contains a first disc and a second disc. The first disc has a selection area with criteria to be selected and selection recommendations and is divided into selection regions of equal size. The second disc is rotatably connected to the first disc about an axis of rotation. The second disc partly conceals the selection area and visually frees an area region of the selection area that corresponds to one of the selection regions in terms of size and shape.

Abstract: Information is stored in an optical element in the form of a glass or plastic body embodied as spectacles lens, spectacles lens blank or spectacles lens semi-finished product. The information in the form of data is stored on or in the glass or plastic body by creating at least one marking with a marking system. The marking can be read by a reading apparatus. The marking system has an interface for reading information individualizing the optical element. The marking is created permanently by the marking system on or in the optical element at a definition point of a local body-specific coordinate system set by two points on or in the optical element. In this body coordinate system, the manufacturer specifies the position of the lens horizontal and/or the far and/or the near and/or the prism reference point.

Abstract: A method for producing a semi-finished spectacle lens and a semi-finished spectacle lens includes identifying the semi-finished spectacle lens by applying a removable sticker having a unique code to the semi-finished spectacle lens. The semi-finished spectacle lens has an embossed code that is engraved into the semi-finished spectacle lens. The sticker is applied to at least partially cover the embossed code. The sticker can be applied directly onto the semi-finished spectacle lens early in the manufacturing process, for example immediately after molding or injection molding. The sticker can also be applied to the semi-finished spectacle lens before further surface treatment is carried out.

Abstract: An apparatus and a method for measuring individual data of spectacles arranged in a measurement position are disclosed. The spectacles have a left and/or a right spectacle lens. The apparatus has a display for displaying a test structure. The apparatus contains an image capture device for capturing the test structure with an imaging beam path which passing through the left spectacle lens and/or the right spectacle lens of the spectacles. Further, the apparatus includes a computer unit with a computer program for determining a refractive power distribution for at least a section of the left spectacle lens and/or the right spectacle lens from the image of the test structure captured by the image capture device and a known spatial orientation of the display relative to the image capture device. To measure individual data of spectacles, the spectacles are arranged in a measurement position.

Abstract: A process, in particular a 3D printing process, for producing a spectacle lens is disclosed. The process includes providing a coated substrate, providing a three-dimensional model of the spectacle lens, digitally cutting the three-dimensional model into individual two-dimensional layers, providing at least one printing ink, typically a 3D printing ink, building up the spectacle lens from the sum of the individual two-dimensional layers with a printing operation on the substrate, and hardening of the spectacle lens. The hardening can take place completely or partially after application of individual volume elements or after application of a layer, and the partial hardening can be completed after conclusion of the printing process.

Abstract: A method for manufacturing a spectacle lens according to at least one data set of edging data and a computer program product with instructions for performing the method are disclosed. A spectacle lens blank, semifinished spectacle lens product, or a finished spectacle lens product is inspected for defects and compared to a data set to determine if it can be manufactured into an edged finished spectacle lens that fits into a specific spectacle frame such that the defect is not present in the edged finished spectacle lens.

Abstract: A progressive spectacle lens has a front surface, a rear surface, and a spatially varying refractive index. The progressive spectacle lens can have: (a) a refractive index that changes only in a first and second spatial dimension and is constant in a third spatial dimension, and the distribution of the refractive index in the first spatial dimension and the second spatial dimension is neither punctually nor axially symmetric; (b) a refractive index that changes in a first, a second, and third spatial dimension, and the distribution of the refractive index in the first spatial dimension and the second spatial dimension is neither punctually nor axially symmetric on all planes perpendicular to the third spatial dimension; or (c) a refractive index that changes in a first, second, and third spatial dimension, and the distribution of the refractive index is not punctually or axially symmetric at all.

Abstract: A bifocal spectacle lens and a method for creating a numerical representation of a bifocal spectacle lens are disclosed. The bifocal spectacle lens includes a distance portion, a near portion, and a transition section situated between the distance portion and the near portion. The distance portion is optimized in view of an optical power for distance vision and the near portion is optimized in view of an optical power for near vision. The transition section is determined such that the transition section creates a continuous transition between the distance portion and the near portion. The distance portion and the near portion are optimized independently of one another and put together with the transition section to form the numerical representation of the bifocal spectacle lens.

Abstract: A method, a device, and a computer program for determining at least one optical parameter of a spectacle lens, and a method for manufacturing the spectacle lens using the at least one optical parameter are disclosed. The optical parameter denotes a value for a property of the spectacle lens which is adjusted during manufacture of the spectacle lens to achieve an intended correction of ametropia of at least one eye of a user of the spectacle lens. The method includes: a) capturing at least one image of a user wearing the spectacle lens; and b) determining at least one optical parameter of the spectacle lens by image processing the at least one image, wherein the at least one image contains an eye portion including at least one eye and/or a face portion adjacent to at least one eye of a user of the spectacle lens.

Abstract: The local refractive power and/or the refractive power distribution of a left and/or a right spectacle lens in a spectacle frame is measured in the wearing position on the head of a spectacle wearer by capturing at least two images of an eye of the spectacle wearer from different recording positions. The disclosure also relates to a computer program product having a computer program with program code and to an apparatus for carrying out the method.

Abstract: A finished uncut spectacle lens has a curved front surface including an optical bowl with a convex curvature and a peripheral lentic zone surrounding the optical bowl. The curvature of the curved front surface in the peripheral lentic zone is flatter than in the optical bowl. The optical bowl size is large enough that a lens filling the entire frame can be glazed from it. The inclusion of a flatter peripheral lentic zone enables a larger diameter of the finished unglazed lens (d) with larger edge thickness than would be possible if the same back surface was cut on a semi-finished blank having a uniform spherical front, without compromise to the finished lens center thickness. In addition, a method of manufacturing such a spectacle lens and a semi-finished lens blank used in the method are provided.

Abstract: A refractive optical component has a main body with a plurality m of optical layers extending between a front side and a back side, each layer having a thickness, wherein each of the layers extends over a region common to all layers, the common region being greater than the maximum thickness of the respective layer by at least a factor of 10, wherein the thickness of the layers varies over the extent thereof transversely to the principal axis, and wherein the main body has a refractive index curve (n=n(x, y, z)), modulated at least in the direction parallel to the principal axis, with a plurality of maxima and minima, a distance between adjacent maxima and minima ranging between 0.5 ?m and 100 ?m and a refractive index difference ?n between adjacent maxima and minima ranging between 10?4 and 0.3.

Abstract: A virtual try-on process for spectacles includes an approximate positioning and a fine positioning of a spectacle frame on a head of a user. Provided for this purpose are 3D models of the head and the spectacle frame, as well as head metadata based on the model of the head and frame metadata based on the model of the frame. The head metadata contains placement information, in particular a placement point, which can be used for the approximate positioning of the spectacle frame on the head, and/or a placement region which describes a region of the earpiece part of the frame for placement on the ears of the head. A rapid and relatively simple computational positioning of the spectacle frame on the head and a more accurate positioning using a subsequent precise adjustment can be achieved with the aid of the metadata.