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1. (WO2018202713) METHOD FOR DETERMINING ASTIGMATISM OF AN EYE OF A PERSON

Pub. No.:    WO/2018/202713    International Application No.:    PCT/EP2018/061207
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Thu May 03 01:59:59 CEST 2018
IPC: A61B 3/036
G02C 7/02
Applicants: ESSILOR INTERNATIONAL
Inventors: MARIN, Gildas
PERRIN, Jean-Luc
HERNANDEZ-CASTANEDA, Martha
Title: METHOD FOR DETERMINING ASTIGMATISM OF AN EYE OF A PERSON
Abstract:
Method for determining the cylinder of an ophthalmic lens to be mounted on a spectacle frame, the method comprising -a measuring device providing step during which a measuring device adapted to run a Jackson cross cylinder procedure is provided, -a first vector determining step, during which the components of a first vector of the cylinder in a two-dimensional vector cylinder representation are determined, -a second vector determining step, during which the components of a second vector of the cylinder in the two-dimensional vector cylinder representation are determined wherein the second vector components being determined such that the Euclidian distance between first and second vector is independent of the value of the cylinder.