A METHOD OF MANUFACTURING A SPECTACLE LENS PROVIDING AN ASTIGMATIC CORRECTION AND SPECTACLES INCLUDING SUCH SPECTACLE LENS

A method of manufacturing a spectacle lens providing at least an astigmatic correction for a customer comprises: - measuring a direction of an axis of an astigmatism of an eye for each of different directions of gaze of the eye; - determining a position of the spectacle lens relative to the customer...

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Bibliographic Details
Main Author Wietschorke, Helmut
Format Patent
LanguageEnglish
French
German
Published 02.01.2019
Subjects
CONTACT LENSES
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
OPTICS
PHYSICS
SPECTACLES
SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES
SURGERY
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Summary:A method of manufacturing a spectacle lens providing at least an astigmatic correction for a customer comprises: - measuring a direction of an axis of an astigmatism of an eye for each of different directions of gaze of the eye; - determining a position of the spectacle lens relative to the customer's eye; and - computing a shape of a surface of the spectacle lens based on the determined position of the spectacle lens relative to the eye and the measured directions of the axis of the astigmatism; wherein the measuring of the direction of the axis of the astigmatism of the eye is performed for more than 15 mutually different directions of gaze, wherein the calculating of the shape of the surface of the spectacle lens includes a simulation of light rays traversing the eye and the spectacle lens for a plurality of directions of gaze of the eye, and wherein the direction of the astigmatism of the eye for the plurality of directions of gaze is determined by interpolation of the measured directions of the axis of the astigmatism of the eye.
Bibliography:Application Number: EP20170210323