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CN-122028840-A - Method and device for determining at least one refractive value of an eye

CN122028840ACN 122028840 ACN122028840 ACN 122028840ACN-122028840-A

Abstract

The invention relates to a method (218), a computer program and a device (110) for determining at least one refractive value (216) of an eye (112) of a person (114), and a related method (210) for producing at least one ophthalmic lens (212) for an eye (112) of a person (114). The method (218) comprises the steps of a) (220) displaying visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.+ -.) wherein each radial line (126, 126',.+ -.) has a different angular value (128, 128',.+ -.) relative to a center (130) of the visual stimulus (120), b) (224) recording a response of the person (114) to the visual stimulus (120), and c) (226) determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the visual stimulus (120), wherein step a) (220) comprises each radial line (126, 126',.+ -.) being projected to the eye (112) of the person (114) at a specific defocus plane, thereby providing the eye (112) of the person (114) with a specific refractive power, and wherein step b) (224) comprises recording a specific refractive value (146) of the person (114) indicating that the specific angular value (146) of the visual stimulus (114) has occurred at a maximum sharpness to the eye (112) of the particular refractive value (144).

Inventors

  • T. Byron
  • M. Arvenhouse
  • D. Widman
  • M. Walch

Assignees

  • 卡尔蔡司光学国际有限公司

Dates

Publication Date
20260512
Application Date
20241115
Priority Date
20231116

Claims (20)

  1. 1. A method (218) for determining at least one refractive value (216) of an eye (112) of a person (114), the method (218) comprising the steps of: a) (220) displaying a visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.) wherein each radial line (126, 126',.) has a different angular value (128, 128',.) relative to a center (130) of the visual stimulus (120); b) (224) recording the response of the person (114) to the visual stimulus (120), and C) (226) determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the visual stimulus (120), Wherein step a) (220) comprises each radial line (126, 126',.+ -.) being projected to the eye (112) of the person (114) at a particular defocus plane, thereby providing the eye (112) of the person (114) with a particular diopter, and step b) (224) comprises recording that the person's (114) response to the visual stimulus (120) indicates that the particular radial line (144) at a particular angle value (146) appears with maximum sharpness (148) to the eye (112) of the person (114), It is characterized in that the method comprises the steps of, The method (218) further comprises the steps of: d) (222) rotating the visual stimulus (120) by the person (114), wherein each radial line (126, 126',.+ -.) is changed with respect to an angular value (128, 128',.+ -.) of a center (130) of the visual stimulus (120), thereby obtaining a rotated visual stimulus (136); e) (228) further rotating the visual stimulus (120) by the person (114), thereby obtaining a further rotated visual stimulus (170), wherein each radial line (126, 126',.) is further changed with respect to an angular value (128, 128',.) of a center (130) of the visual stimulus (120); f) (230) recording a further response of the person (114) to the further rotated visual stimulus (170), the further response indicating that a further particular radial line (166) at a further particular angle value (168) appears with maximum sharpness (148) to the eye (112) of the person (114), wherein the further particular angle value (168) is perpendicular to the particular angle value (146) according to step d) (224), and G) (232) determining at least one further refractive value (216) of the eye (112) of the person (114) by evaluating the further response of the person (114) to the further rotated visual stimulus (170), Wherein recording the response of the person (114) to the visual stimulus (120) according to step b) comprises indicating that a particular radial line (144) at a particular angular value (146) in the rotated visual stimulus (136) appears with maximum sharpness (148) for the eye (112) of the person (114), and wherein determining the at least one refractive value (216) of the eye (112) of the person (114) according to step c) further comprises evaluating the response of the person (114) to the rotated visual stimulus (136).
  2. 2. The method (218) of the preceding claim, wherein step d) (226) comprises simultaneously -Determining the principal meridian from a specific angle value, a specific radial line (144) at which the specific angle value appears with maximum sharpness (148) for the eye (112) of the person (114), and -Determining from a particular diopter value, at which the particular radial line (144) projected at the particular defocus plane is, the difference between the maximum and minimum value of diopter.
  3. 3. The method (218) of any one of the preceding claims, wherein step g) (232) includes -Determining from a further specific angle value (168) a perpendicular meridian perpendicular to the principal meridian, a further specific radial line (166) at the further specific angle value occurring with maximum sharpness (148) for the eye (112) of the person (114); -determining a maximum value of the diopter from another particular diopter value at which the other particular radial line (166) projected at another particular defocus plane is, and -Determining a minimum value of diopter by using the maximum value of diopter and the difference between the maximum and minimum values of diopter.
  4. 4. The method (218) of any one of the preceding claims, wherein displaying the visual stimulus (120) to the eye (112) of the person (114) comprises using a projection device (118), wherein the projection device (118) is configured for using a virtual display technique, wherein the projection device (118) is particularly selected from at least one of a light field, a holographic element or a retinal laser beam projection.
  5. 5. The method (218) of any one of the preceding claims, wherein the radial lines (126, 126',.) are arranged in a sector having a starburst pattern around a center (130) of the visual stimulus (120).
  6. 6. The method (218) of any one of the preceding claims, wherein the radial lines (126, 126') are arranged in equidistant steps.
  7. 7. The method (218) of any preceding claim, wherein the defocus planes of adjacent radial lines (126, 126') are set by using diopter steps.
  8. 8. The method (218) of any one of the preceding claims, wherein recording the response of the person (114) comprises recording at least one of: -a haptic response of the person (114); -an acoustic response of the person (114); -a gesture of the person (114).
  9. 9. A computer program comprising instructions which, when executed by a computer, cause the computer to carry out a method (218) for determining at least one refractive value (216) of an eye (112) of a person (114), the method (218) comprising the steps of: a) (220) displaying a visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.) wherein each radial line (126, 126',.) has a different angular value (128, 128',.) relative to a center (130) of the visual stimulus (120); b) (224) recording the response of the person (114) to the visual stimulus (120), and C) (226) determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the rotated visual stimulus (136), Wherein step a) (220) comprises each radial line (126, 126',.+ -.) being projected to the eye (112) of the person (114) at a particular defocus plane, thereby providing the eye (112) of the person (114) with a particular diopter, and step b) (224) comprises recording that the person's (114) response to the visual stimulus (120) indicates that the particular radial line (144) at a particular angle value (146) appears with maximum sharpness (148) to the eye (112) of the person (114), It is characterized in that the method comprises the steps of, The method (218) further comprises the steps of: d) (222) rotating the visual stimulus (120) by the person (114), wherein each radial line (126, 126',.+ -.) is changed with respect to an angular value (128, 128',.+ -.) of a center (130) of the visual stimulus (120), thereby obtaining a rotated visual stimulus (136); e) (228) further rotating the visual stimulus (120) by the person (114), thereby obtaining a further rotated visual stimulus (170), wherein each radial line (126, 126',.) is further changed with respect to an angular value (128, 128',.) of a center (130) of the visual stimulus (120); f) (230) recording a further response of the person (114) to the further rotated visual stimulus (170), the further response indicating that a further particular radial line (166) at a further particular angle value (168) appears with maximum sharpness (148) to the eye (112) of the person (114), wherein the further particular angle value (168) is perpendicular to the particular angle value (146) according to step d) (224), and G) (232) determining at least one further refractive value (216) of the eye (112) of the person (114) by evaluating the further response of the person (114) to the further rotated visual stimulus (170), Wherein recording the response of the person (114) to the visual stimulus (120) according to step b) comprises indicating that a particular radial line (144) at a particular angular value (146) in the rotated visual stimulus (136) appears with maximum sharpness (148) for the eye (112) of the person (114), and wherein determining the at least one refractive value (216) of the eye (112) of the person (114) according to step c) further comprises evaluating the response of the person (114) to the rotated visual stimulus (136).
  10. 10. A method (210) for producing at least one ophthalmic lens (212) for an eye (112) of a person (114), the method (210) comprising the steps of: (i) (214) determining at least one refractive value (216) of an eye (112) of a person (114) by using the method (218) according to any one of the preceding claims referring to a method (218) for determining the at least one refractive value (216) of an eye (112) of the person (114); (ii) (234) generating at least one geometric model (236) of at least one ophthalmic lens (212) by using the at least one refractive value (216) of the eye (112) of the person (114), and (Iii) (238) processing at least one lens precursor (240) according to the at least one geometric model (236) of the at least one ophthalmic lens (212), thereby producing the at least one ophthalmic lens (212).
  11. 11. An apparatus (110) for determining at least one refractive value (216) of an eye (112) of a person (114), the apparatus (110) comprising: -at least one projection device (118), wherein the at least one projection device (118) is configured to display a visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.) wherein each radial line (126, 126',.) has a different angular value (128, 128',.) with respect to a center (130) of the visual stimulus (120); -at least one input element (150), wherein the at least one input element (150) is configured for recording the response of the person (114) to the visual stimulus (120), and At least one evaluation device (156), wherein the at least one evaluation device (156) is configured for determining at least one refractive value (216) of an eye (112) of the person (114) by evaluating a response of the person (114) to the visual stimulus (120), Wherein the at least one projection device (118) is further configured to display the visual stimulus (120) to the eye (112) of the person (114) such that each radial line (126, 126',.) is projected to the eye (112) of the person (114) at a particular defocus plane, thereby providing a particular diopter value to the eye (112) of the person (114), and wherein the at least one input element (150) is further configured to record a response of the person (114) to the visual stimulus (120) indicative of the particular radial line (144) at a particular angle value (146) occurring at a maximum sharpness (148) to the eye (112) of the person (114), It is characterized in that the method comprises the steps of, At least one rotating element (134), wherein the at least one rotating element (134) is configured for rotating the visual stimulus (120) by the person (114), wherein an angular value (128, 128',.) of each radial line (126, 126',.) with respect to a center (130) of the visual stimulus (120) is changed, thereby obtaining a rotated visual stimulus (136), Wherein the at least one input element (150) is further configured for recording a response of the person (114) to the rotated visual stimulus (136), wherein the at least one evaluation device (156) is further configured for determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the rotated visual stimulus (136), Wherein the at least one rotating element (134) is further configured for further rotating the visual stimulus (120) by the person (114), thereby obtaining a further rotated visual stimulus (170), wherein an angle value (128, 128',.) of each radial line (126, 126',.) with respect to a center (130) of the visual stimulus (120) is further changed; Wherein the at least one input element (150) is further configured for recording a further response of the person (114) to the further rotated visual stimulus (170), the further response being indicative of a further particular radial line (166) at a further particular angle value (168) occurring with maximum sharpness (144) for an eye (112) of the person (114), wherein the further particular angle value (168) is perpendicular to the particular angle value (146) according to step d), and Wherein the at least one evaluation device (156) is further configured for determining at least one further refraction value (216) of the eye (112) of the person (114) by evaluating the further response of the person (114) to the further rotated visual stimulus (170).
  12. 12. A method (218) for determining at least one refractive value (216) of an eye (112) of a person (114), the method (218) comprising the steps of: a) (220) displaying a visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.) wherein each radial line (126, 126',.) has a different angular value (128, 128',.) relative to a center (130) of the visual stimulus (120); b) (224) recording the response of the person (114) to the visual stimulus (120), and C) (226) determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the visual stimulus (120), Wherein step a) (220) comprises each radial line (126, 126',.+ -.) being projected to the eye (112) of the person (114) at a particular defocus plane, thereby providing the eye (112) of the person (114) with a particular diopter, and step b) (224) comprises recording that the person's (114) response to the visual stimulus (120) indicates that the particular radial line (144) at a particular angle value (146) appears with maximum sharpness (148) to the eye (112) of the person (114), It is characterized in that the method comprises the steps of, The method (218) further comprises the steps of: d) (222) rotating the visual stimulus (120) by the person (114), wherein each radial line (126, 126',.+ -.) is changed with respect to an angular value (128, 128',.+ -.) of a center (130) of the visual stimulus (120), thereby obtaining a rotated visual stimulus (136); e) (228) further rotating the visual stimulus (120) by the person (114), thereby obtaining a further rotated visual stimulus (170), wherein each radial line (126, 126',.) is further changed with respect to an angular value (128, 128',.) of a center (130) of the visual stimulus (120); f) (230) recording a further response of the person (114) to the further rotated visual stimulus (170), the further response indicating that a further particular radial line (166) at a further particular angle value (168) appears with maximum sharpness (148) to the eye (112) of the person (114), wherein the further particular angle value (168) is perpendicular to the particular angle value (146) according to step d) (224), and G) (232) determining at least one further refractive value (216) of the eye (112) of the person (114) by evaluating the further response of the person (114) to the further rotated visual stimulus (170), Wherein recording the response of the person (114) to the visual stimulus (120) according to step b) comprises indicating that a particular radial line (144) at a particular angular value (146) in the rotated visual stimulus (136) appears with maximum sharpness (148) to the eye (112) of the person (114), Wherein determining the at least one refractive value (216) of the eye (112) of the person (114) according to step c) further comprises assessing the response of the person (114) to the rotated visual stimulus (136), and Wherein step d) (226) includes simultaneously -Determining the principal meridian from a specific angle value, a specific radial line (144) at which the specific angle value appears with maximum sharpness (148) for the eye (112) of the person (114), and -Determining from a particular diopter value, at which the particular radial line (144) projected at the particular defocus plane is, the difference between the maximum and minimum value of diopter.
  13. 13. The method (218) of the preceding claim, wherein step g) (232) comprises -Determining from a further specific angle value (168) a perpendicular meridian perpendicular to the principal meridian, a further specific radial line (166) at the further specific angle value occurring with maximum sharpness (148) for the eye (112) of the person (114); -determining a maximum value of the diopter from another particular diopter value at which the other particular radial line (166) projected at another particular defocus plane is, and -Determining a minimum value of diopter by using the maximum value of diopter and the difference between the maximum and minimum values of diopter.
  14. 14. The method (218) according to any one of claims 12 or 13, wherein displaying the visual stimulus (120) to the eye (112) of the person (114) comprises using a projection device (118), wherein the projection device (118) is configured for using a virtual display technique, wherein the projection device (118) is particularly selected from at least one of a light field, a holographic element or a retinal laser beam projection.
  15. 15. The method (218) of any one of claims 12 to 14, wherein the radial lines (126, 126',.) are arranged in a sector having a starburst pattern around a center (130) of the visual stimulus (120).
  16. 16. The method (218) of any one of claims 12 to 15, wherein the radial lines (126, 126') are arranged in equidistant steps.
  17. 17. The method (218) of any one of claims 12 to 16, wherein the defocus planes of adjacent radial lines (126, 126',...
  18. 18. The method (218) of any one of claims 12 to 17, wherein recording the response of the person (114) includes recording at least one of: -a haptic response of the person (114); -an acoustic response of the person (114); -a gesture of the person (114).
  19. 19. A computer program comprising instructions which, when executed by a computer, cause the computer to carry out a method (218) for determining at least one refractive value (216) of an eye (112) of a person (114), the method (218) comprising the steps of: a) (220) displaying a visual stimulus (120) to an eye (112) of a person (114), wherein the visual stimulus (120) comprises a plurality of concentric radial lines (126, 126',.) wherein each radial line (126, 126',.) has a different angular value (128, 128',.) relative to a center (130) of the visual stimulus (120); b) (224) recording the response of the person (114) to the visual stimulus (120), and C) (226) determining at least one refractive value (216) of the eye (112) of the person (114) by evaluating the response of the person (114) to the rotated visual stimulus (136), Wherein step a) (220) comprises each radial line (126, 126',.+ -.) being projected to the eye (112) of the person (114) at a particular defocus plane, thereby providing the eye (112) of the person (114) with a particular diopter, and step b) (224) comprises recording that the person's (114) response to the visual stimulus (120) indicates that the particular radial line (144) at a particular angle value (146) appears with maximum sharpness (148) to the eye (112) of the person (114), It is characterized in that the method comprises the steps of, The method (218) further comprises the steps of: d) (222) rotating the visual stimulus (120) by the person (114), wherein each radial line (126, 126',.+ -.) is changed with respect to an angular value (128, 128',.+ -.) of a center (130) of the visual stimulus (120), thereby obtaining a rotated visual stimulus (136); Wherein recording the response of the person (114) to the visual stimulus (120) according to step b) comprises indicating that a particular radial line (144) at a particular angular value (146) in the rotated visual stimulus (136) appears with maximum sharpness (148) to the eye (112) of the person (114), E) (228) further rotating the visual stimulus (120) by the person (114), thereby obtaining a further rotated visual stimulus (170), wherein each radial line (126, 126',.) is further changed with respect to an angular value (128, 128',.) of a center (130) of the visual stimulus (120); f) (230) recording a further response of the person (114) to the further rotated visual stimulus (170), the further response indicating that a further particular radial line (166) at a further particular angle value (168) appears with maximum sharpness (148) to the eye (112) of the person (114), wherein the further particular angle value (168) is perpendicular to the particular angle value (146) according to step d) (224), and G) (232) determining at least one further refractive value (216) of the eye (112) of the person (114) by evaluating the further response of the person (114) to the further rotated visual stimulus (170), Wherein determining the at least one refractive value (216) of the eye (112) of the person (114) according to step c) further comprises assessing the response of the person (114) to the rotated visual stimulus (136), and Wherein step d) (226) includes simultaneously -Determining the principal meridian from a specific angle value, a specific radial line (144) at which the specific angle value appears with maximum sharpness (148) for the eye (112) of the person (114), and -Determining from a particular diopter value, at which the particular radial line (144) projected at the particular defocus plane is, the difference between the maximum and minimum value of diopter.
  20. 20. A method (210) for producing at least one ophthalmic lens (212) for an eye (112) of a person (114), the method (210) comprising the steps of: (i) (214) determining at least one refractive value (216) of an eye (112) of a person (114) by using a method (218) for determining the at least one refractive value (216) of an eye (112) of the person (114) according to any one of claims 12 to 18; (ii) (234) generating at least one geometric model (236) of at least one ophthalmic lens (212) by using the at least one refractive value (216) of the eye (112) of the person (114), and (Iii) (238) processing at least one lens precursor (240) according to the at least one geometric model (236) of the at least one ophthalmic lens (212), thereby producing the at least one ophthalmic lens (212).

Description

Method and device for determining at least one refractive value of an eye Technical Field The present invention relates to a method, a computer program and a device for determining at least one refractive value of an eye of a person, and to a related method for producing at least one ophthalmic lens for an eye of a person. Background Subjective vision testing was performed using a rotating disc chart to determine the best sphere power, cylinder power, axis of astigmatism and power, traceable back to the nineteenth century. As Keirl a. W. And Christie c., clinical Optics & Refraction [ Clinical Optics and refraction ], 1 st edition, butterworth-heineemann, oxford [ Butterworth-hainiman press, oxford ], 2007, pages 117-123 and Elliot d.b., clinical Procedures IN PRIMARY EYE CARE [ Clinical program of primary eye care ], butterworth-heineemann, oxford, 2003, pages 117-123, lancaster attributing the use of star-shaped patterns comprising a plurality of concentric radial lines to Donders, which was used as a practical astigmatism test method as early as 1860. Green, working with Donders and Snellen, perfected the hash table between 1866 and 1869. In 1899 Verhoeff a chart with two principal meridians was proposed to measure the amount of astigmatism. Variants of the so-called "crossed-cylinder method" have emerged, including daylighting charts or clock dial tables with lines at 30 ° intervals or more frequent intervals (most commonly 10 °). Keirl a.w. and Christie c. (see above) further describe the so-called "sector-block technique", which is often implemented in vision testing units to determine the best sphere power, axis of astigmatism and power. In this context, the sector is used to determine the presence of astigmatism and its principal axis, while the block is used in combination with a cylindrical lens in order to neutralize the astigmatism. In particular, the sector-block technique may include the following two elements: A sector chart comprising a plurality of concentric radial lines at intervals of 10 DEG, each line subtending an extension (limb) corresponding to 6/18 at a distance of 6m, the lines being arranged around a central rotating disk marked with an arrow called "Maddox V", wherein the numbers around the radial lines indicate the axial positions of corrective positive and negative cylindrical lenses, and -A central rotatable disc comprising Maddox V arrow, and Two parallel line blocks arranged at 90 deg. with respect to each other, Wherein the central rotatable disc is designed such that the block is aligned with the main meridian of the human eye when the Maddox V arrow rotates towards the line of the sector having the greatest definition for the human eye. The so-called "test chart 2020" provided by Thomson software solutions company (Thomson Software Solutions) at https:// www.thomson-software-solutions. Com/test-chart-xpert-3 di/includes a plurality of test charts and vision tests, binocular vision tests and refractive stimuli. In order to use them, it is necessary to install software on a personal computer, install a monitor on a wall, input a screen viewing distance, and perform a calibration test. Including sector-block tests for identifying and correcting astigmatism. ANDREW CARKEET, jia Hao Ng and Jia Sheng Choo,Bearing fixing: A new computer algorithm method for subjective determination of astigmatism[ reference position fixation a new computer algorithm method for subjectively determining astigmatism, ophthalmic and Physiological Optics [ ophthalmic and physiological optics ] 41 (5), 2021 proposes the principle of reference position fixation (a computer controlled program for subjectively determining astigmatism) and compares it to conventional jackson cross-prism refraction controlled by a clinician. Two astigmatism measurements were made using a reference fixation and Jackson cross-cylinder on 20 visually normal participants aged between 18 and 34 years. After final sphere adjustment, visual acuity measurements were made for each refractive estimate. The reference bit fixing results of all participants can be obtained. The average reference fixed cylinder power is slightly higher than the Jackson crossed cylinder measured cylinder power by 0.05D. By using vector analysis to take into account cylinder power and axis position, the mean reference position fixed astigmatism is not significantly different from the cross cylinder astigmatism, but the retest variability is indeed higher (p < 0.05). Visual acuity with reference position fixes and cross-cylinder correction did not differ significantly in mean or repeatability. Further alternative methods of displaying test patterns are known, in particular virtual refractive systems (e.g. Vision optimizers), i.e. systems that place refractive elements over the patient' S head), digital infinite refractive systems (e.g. Vision-S700 by the company escilor) or guided refractive systems (e.g. VASRTM by the company cupcon (Topcon) Chronos or V