Patent ID: 9671617
Date: 2017-06-06
CPC Classifications: A61B,G02C

Claim:
1. A method for estimating an eye/spectacles distance, between a characteristic plane of a pair of spectacles and a characteristic point of an eye of a wearer of said pair of spectacles, with the help of a determination device comprising an image sensor and a calculation unit, the method comprising steps: a) of acquisition by the image sensor of at least two distinct images of at least one part of the head of the wearer, in which the head of the wearer exhibits various angular positions with respect to the image sensor around a pivoting axis which is substantially parallel to said characteristic plane and which is substantially transverse to the optical axis of the image sensor, b) of determination, for each image acquired, of an angle of inclination of the head of the wearer with respect to the image sensor, measured between the optical axis of the image sensor and a plane tied to the head of the wearer which is substantially parallel to said pivoting axis and substantially orthogonal to said characteristic plane, c) of acquisition of at least two predetermined simulated values of the eye/spectacles distance sought stored in read-only memory of the calculation unit, d) of calculation, for each image acquired and with each simulated value acquired, of a morphological distance between the characteristic point of the eye of the wearer and the plane tied to the head of the wearer, as a function of said angle of inclination, and e) of selection, from among the simulated values of the eye/spectacles distance sought, of the value closest to the eye/spectacles distance of the wearer, as a function of the head/plane distances calculated in step d).