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CN-121978850-A - Data record for use in a method of producing an ophthalmic lens

CN121978850ACN 121978850 ACN121978850 ACN 121978850ACN-121978850-A

Abstract

Data record for use in a method of producing an ophthalmic lens. The present invention relates to a data record stored on a data medium for use in a method of producing an ophthalmic lens, a method and a computer program for generating a data record, and a method for producing an ophthalmic lens. The data record includes at least the spatial coordinates of a reference point for each eye of the wearer, at least one spatial direction vector for specifying at least one viewing direction of the wearer through the eyeglass lens, and a spatial rim curve or edge curve. With the present method it has been possible to produce ophthalmic lenses after a single capture of a data record to adapt the ophthalmic lenses to the wearer of a pair of spectacles and to the spectacle frame selected by the wearer. As a result, a different spectacle lens than the spectacle lens originally selected by the wearer can then be used for the spectacle lens without having to perform an additional data record of such an adaptation for the wearer.

Inventors

  • M. Gan Peilin
  • H. Wertshork
  • HAAS PETER JAY

Assignees

  • 卡尔蔡司光学国际有限公司

Dates

Publication Date
20260505
Application Date
20200228
Priority Date
20190301

Claims (14)

  1. 1. A computer readable storage medium having stored thereon a data record for use in a method of producing an ophthalmic lens, It is characterized in that the method comprises the steps of, The data record comprises at least the following data values, individually or together referred to as universal centering data: -spatial coordinates of a reference point at each eye (112, 112') of the wearer; -at least one spatial direction vector for specifying at least one viewing direction (120, 120') of the wearer through the spectacle lens, and A spatial rim curve or edge curve (128, 128'), Wherein the data record comprises additional information, wherein the additional information relates to at least one correction of the data values, Wherein the correction of the data values comprises at least one of the following correction values: -a spatial variation of the head pose of the user; -a change in the vertical coordinates of at least one viewpoint (132,132'); -a change of the spatial direction vector indicating at least one viewing direction (120, 120 ') of the user through the spectacle lens relative to a viewing direction (120, 120 ') employed by the user when recording the viewing direction (120, 120 ').
  2. 2. The computer-readable storage medium of claim 1, wherein all data values are specified with respect to a same spatial coordinate system (110).
  3. 3. The computer readable storage medium according to claim 1 or 2, wherein the reference point on the eye (112, 112 ') of the wearer is selected from the group consisting of pupil center (118, 118 '), pupil reflection, corneal vertex, or center of rotation (114, 114 ') of the eye.
  4. 4. The computer readable storage medium according to claim 1 or 2, characterized in that at least one viewing direction (120, 120 ') of the user through the spectacle lens is selected from a main viewing direction of the user, a main viewing direction, an activity specific viewing direction (126, 126'), a viewing direction of the user modified by a corrective value.
  5. 5. The computer readable storage medium of claim 1 or 2, wherein the rim curve or edge curve (128, 128') is obtainable in the form of a plurality of data points, wherein the data points are selected from edge values of the spectacle frame (150) or lens rim captured by measurements of the spectacle frame (150) or lens rim, design data.
  6. 6. The computer readable storage medium of claim 1 or 2, wherein the additional information is incorporated in the data record as at least one additional data value, or wherein the additional information is included in at least one of the data values of the data record.
  7. 7. The computer-readable storage medium of claim 1, wherein the spatial variation of the wearer's head pose comprises -A change in habitual head posture and correction of the forward inclination of the wearer's head; -a variation of the rotation of the wearer's head, and/or -A change in lateral inclination of the wearer's head at the time of the image recording.
  8. 8. The computer readable storage medium of claim 1, wherein the change in the vertical coordinates of the at least one point of view comprises a displacement of the imprinting image in a vertical direction parallel to a frame plane of the eyeglass frame.
  9. 9. A method for generating a data record for use in a method for producing an ophthalmic lens, It is characterized in that the method comprises the steps of, The data record comprises at least the following data values, individually or together referred to as universal centering data: -spatial coordinates of a reference point at each eye (112, 112') of the user; -at least one spatial direction vector for specifying at least one viewing direction (120, 120') of the user through the spectacle lens, and A spatial rim curve or edge curve (128, 128'), Wherein each of these data values is generated from a value captured by measurement or from available data, Wherein the data record comprises additional information, wherein the additional information relates to at least one correction of the data values, Wherein the correction of the data values comprises at least one of the following correction values: -a spatial variation of the head pose of the user; -a change in the vertical coordinates of at least one viewpoint (132,132'); -a change of the spatial direction vector indicating at least one viewing direction (120, 120 ') of the user through the spectacle lens relative to a viewing direction (120, 120 ') employed by the user when recording the viewing direction (120, 120 ').
  10. 10. The method according to claim 9, wherein each of the data values is captured by means of an optical measuring device, wherein at least one front recording of the user and at least one side recording of the user are performed simultaneously with respect to the viewing direction of the user when the user wears the spectacle frame (150).
  11. 11. The method of claim 10, wherein a virtual model of a portion of the wearer is created from at least one front record of the wearer and at least one side record of the wearer, wherein the portion of the wearer comprises at least each eye (112, 112') of the wearer and a location where the wearer is ready to wear the spectacle frame (150), wherein the spectacle frame (150) is worn by the virtual model.
  12. 12. A method (160) for producing an ophthalmic lens, wherein the ophthalmic lens is produced by machining an ophthalmic lens blank, wherein the ophthalmic lens blank is machined based on centering data, wherein the centering data is determined from a data record, It is characterized in that the method comprises the steps of, The data record comprises at least the following data values, individually or together referred to as universal centering data: -spatial coordinates of a reference point on the wearer's eye (112, 112'); -at least one spatial direction vector for specifying at least one viewing direction (120, 120') of the wearer through the spectacle lens, and A spatial rim curve or edge curve (128, 128'), Wherein the data record comprises additional information, wherein the additional information relates to at least one correction of the data values, Wherein the correction of the data values comprises at least one of the following correction values: -a spatial variation of the head pose of the user; -a change in the vertical coordinates of at least one viewpoint (132,132'); -a change of the spatial direction vector indicating at least one viewing direction (120, 120 ') of the user through the spectacle lens relative to a viewing direction (120, 120 ') employed by the user when recording the viewing direction (120, 120 ').
  13. 13. The method (160) of claim 12, wherein the centering data is selected from at least one of the following centering values: -a distance (136, 136 ') between the corneal vertex of the respective eye (112, 112') and the viewpoint (132,132 ') of the viewing direction (120, 120'); -the distance between the viewpoint (132,132 ') and the straight line (138, 138 ') passing through the innermost points of these rim curves or edge curves (128, 128 '); -the distance between the viewpoint (132,132 ') and the straight line (140, 140 ') passing through the lowest point of these rim curves or edge curves (128, 128 '); -the horizontal distance between the vertical inner and outer boundaries of the rectangle circumscribing these rim curves or edge curves (128, 128 ') and being located in the box system (146, 146 ') in the lens plane (130, 130 '); -the vertical distance between the horizontal upper and lower boundaries of the rectangle circumscribing the rim curves or edge curves (128, 128 ') and being located in the frame system (146, 146 ') within the lens plane (130, 130 '); -the horizontal distance between the viewpoints (132,132 ') and the vertical centre line (142, 142') of the box system (146); -the vertical distance between the viewpoints (132,132 ') and the horizontal centre line (142, 142') of the box system (146); -a distance (136, 136 ') between the corneal vertex of the respective eye (112, 112') and the lens plane (148); -an angle between the lens plane (130, 130') and the frame plane (148); -the frame plane (148) is inclined forward from the vertical.
  14. 14. The method of claim 12 or 13, wherein the production of the spectacle lens is independent of the data recording -Whether generated by at least two images of the wearer recorded from different viewing directions and calibrated to each other with the spectacle frame (150) being worn and adapted, or -Whether generated by at least two-dimensional visualisation recordings of a proxy of the wearer's head captured from different viewing directions with the spectacle frame (150) virtually worn and virtually adapted, or -Whether or not generated by a three-dimensional model of the head with the spectacle frame (150) virtually worn and virtually adapted.

Description

Data record for use in a method of producing an ophthalmic lens The present application is a divisional application of patent application with application number of 2020, application number of 202080018110.4, international application number of PCT/EP2020/055265, entitled "data recording for use in a method of producing spectacle lenses". Technical Field The present invention relates to a data record stored on a data medium for use in a method of producing an ophthalmic lens, a method and a computer program for generating a data record, and a method for producing an ophthalmic lens. Background The prior art has disclosed data records stored on a storage medium for use in a method of producing an ophthalmic lens, associated methods and computer programs for generating data records, and methods for producing an ophthalmic lens. The DIN EN ISO 13666:2013-10 standard (hereinafter "standard") is simultaneously replaced by DINEN ISO 13666:2019-12, defines the basic terminology of ophthalmic optics, in particular the terminology of the semi-finished ophthalmic lenses, also called "spectacle lens blanks", relating to finished spectacle lenses, in particular to the finished spectacle lenses or spectacle frames selected by the wearer of a pair of spectacles, for introducing at least a plurality of parameters of the spectacle lenses, and provides a method for adapting the spectacle lenses to the wearer of a pair of spectacles and to the spectacle frames selected by the wearer. In the present invention, reference to DIN EN ISO 13666:2013-10 is a reference. Using this criterion, the method for adapting an ophthalmic lens to a spectacle frame selected by a wearer is generally performed as part of the wearer's visit to an optician, according to the following sequence of method steps specified below: "determining correction" by performing a subjective refraction to determine the necessary correction of the refractive error of the eyes of the wearer of a pair of glasses, wherein using known values captured by measurement, such as an ophthalmic prescription from the user, and/or wherein an objective refraction of both eyes of the wearer can be determined by performing a refraction using a known refractor; "select spectacle frame": the wearer selects at least one spectacle frame; "determining centering data" by creating a centering record in a habitual head pose and in a defined viewing direction of the wearer through the spectacle lenses while the wearer is wearing a pair of spectacles, creating a lens type of the spectacle lenses and thus an associated centering prescription implicitly used for adapting the spectacle lenses to an already set spectacle frame, and "Lens selection" which determines the characteristics of the lens, in particular the lens type, refractive index, hue and at least one coating of the spectacle lens, the lens type being used to determine the centering prescription, is selected by the user and the optician. A disadvantage of this sequence is that the steps of "determining centering data" and "lens selection" are performed in the order described above. One problem that often arises in this case is that the choice of lens type by the optician and the choice of the associated centering prescription may become obsolete. In particular, such problems may occur if the user subsequently selects a different spectacle lens or if the selected spectacle lens cannot be provided with parameters required for correction, for example parameters concerning diameter, thickness or equipment. Since different lens types may be associated with different centering prescriptions, this is accompanied by a variation of the centering prescriptions, which is the basis for determining the centering parameters. This variation makes the centering data already determined obsolete and the determination of the centering data must be repeated by the lens operator under changed boundary conditions, for which purpose it may be necessary to carry out all the above-mentioned method steps again in the presence of the wearer. Furthermore, there is a problem in that the centering data determined by applying the present criterion is insufficient only to capture the actual wearing condition of a pair of eyeglasses of the wearer, since the criterion is exemplarily simplified and omitted. This includes in particular the measurement values determined on one side only but used on both sides in determining the corneal vertex distance, the assumption of a "lens plane" (which may also be referred to as "glass plane") instead of the respective curved surface, the position of the interface of the spectacle lens, the use of only a square system instead of the edge curve of the complete uncut spectacle lens according to section 8.4.7 of the standard, and the assumption that the dimensions of the eyes of the wearer are identical. Considerable problems may occur in calculating the two lens surfaces of an ophthalmic lens (also known as "lens calculation") pr