MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202617052472 A) filed by Carl Zeiss Vision International Gmbh on April 24, 2026, for Method And Apparatus For Determining At Least One Refractive Value Of An Eye.
Inventors include Buehren, Tobias; Avenhaus, Malte; Wiedemann, Doreen; and Walch, Marcel.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: The present invention refers to a method (218), a computer program, and an apparatus (110) for determining at least one refractive value (216) of an eye (112) of a person (114) and to a related method (210) for producing at least one ophthalmic lens (212) for the eye (112) of the person (114). The method (218) comprises the following steps: 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',...) with respect to a center (130) of the visual stimulus (120); b) (224) recording a reaction by 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 reaction by the person (114) to the visual stimulus (120), wherein step a) (220) comprises that each radial line (126, 126',...) is projected at a particular defocus plane to the eye (112) of the person (114), whereby a particular dioptric power is provided to the eye (112) of the person (114), and wherein step b) (224) comprises that recording the reaction by the person (114) to the visual stimulus (120) indicates that a particular radial line (144) at a particular angular value (146) has an appearance of maximum sharpness (148) to the eye (112) of the person (114).
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