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Method for determining at least one geometrico-morphological parameters of a subject in a natural posture for determining a vision correction equipment

A technology for geometric shape and vision correction, which is applied to equipment, TVs, applications, etc. for testing eyes, which can solve problems such as the inability to accurately determine the geometric parameters of the subjects, and the subjects are not allowed to determine the parameters.

Pending Publication Date: 2021-05-04
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For these reasons, known methods cannot accurately determine the geometric form parameters of a subject in a natural pose
[0011] Furthermore, these methods do not allow the subjects to self-determine the parameters

Method used

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  • Method for determining at least one geometrico-morphological parameters of a subject in a natural posture for determining a vision correction equipment
  • Method for determining at least one geometrico-morphological parameters of a subject in a natural posture for determining a vision correction equipment
  • Method for determining at least one geometrico-morphological parameters of a subject in a natural posture for determining a vision correction equipment

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Embodiment Construction

[0046] The following description, enriched by the accompanying drawings, which are considered as non-limiting examples, will facilitate the understanding of the invention and how it can be realized.

[0047] On the attached image:

[0048] - figure 1 is a block diagram of the steps of an embodiment of the method according to the invention,

[0049] - figure 2 is a schematic side view of a first possible relative position of subject, electronic device and target during step d),

[0050] - image 3 is a schematic side view of a second possible relative position of the subject, electronic device and target during step d),

[0051] - Figure 4 is a schematic diagram of a first possible relative position of the subject, electronic device and target seen from above during step d).

[0052] In the following, the expression "natural posture" is defined as a posture in which the position of the head is not subject to physical constraints such as resting a part of the head on a s...

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Abstract

The invention relates to such a method wherein the following steps are performed: a) the subject is placed in a natural posture, in which at least one of the gaze directions (GDR, GDL) of the subject points to a visual target (20), b) an image capture apparatus (12) is placed between the head (50) of the subject and said visual target, c) the relative posture of the image capture apparatus and head of the subject is adjusted in order for the pupil (P) of the image capture apparatus to be positioned close to the gaze direction (GDR, GDL) of at least one of the eyes (OR, OL) of the subject, d) an image of the head of the subject is captured, e) the at least one geometrico-morphological parameter is deduced from this image.

Description

technical field [0001] The invention relates to a method for determining at least one geometrical form parameter of a subject in a natural position for determining vision correction equipment. Background technique [0002] Manufacture of an ophthalmic lens adapted to an individual and frame in order to provide the individual with proper ophthalmic equipment requires fit data to determine that the lens fits the selected frame. [0003] In order to obtain these fit data, the geometry parameters of the subject need to be determined. [0004] Numerous documents describe devices and methods for determining such parameters. These parameters are, for example, the subject's interpupillary distance or the fit height, which is defined as the distance between the pupil of the subject's eye and the bottom edge of the frame or lens worn by the subject under conditions of use. vertical distance. [0005] To be accurate, measuring geometric parameters of the subject such as fit height r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/11
CPCA61B3/11A61B3/111G02C13/005H04N23/611
Inventor S·查恩
Owner ESSILOR INT CIE GEN DOPTIQUE