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1. WO2011001082 - CHARACTERIZATION OF A PERCEPTION OF BLUR

Publication Number WO/2011/001082
Publication Date 06.01.2011
International Application No. PCT/FR2010/051319
International Filing Date 25.06.2010
IPC
A61B 3/028 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
3Apparatus for testing the eyes; Instruments for examining the eyes
02Subjective types, i.e. testing apparatus requiring the active assistance of the patient
028for testing visual acuity; for determination of refraction, e.g. phoropters
CPC
A61B 3/032
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
3Apparatus for testing the eyes; Instruments for examining the eyes
02Subjective types, i.e. testing apparatus requiring the active assistance of the patient
028for testing visual acuity; for determination of refraction, e.g. phoropters
032Devices for presenting test symbols or characters, e.g. test chart projectors
A61B 5/7475
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
74Details of notification to user or communication with user or patient
7475User input or interface means, e.g. keyboard, pointing device, joystick
Applicants
  • ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE) [FR]/[FR] (AllExceptUS)
  • DROBE, Björn [DE]/[FR] (UsOnly)
  • GIRAUDET, Guillaume [FR]/[FR] (UsOnly)
Inventors
  • DROBE, Björn
  • GIRAUDET, Guillaume
Agents
  • BOIRE, Philippe
Priority Data
09 5440829.06.2009FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) CHARACTERIZATION OF A PERCEPTION OF BLUR
(FR) CARACTERISATION D'UNE PERCEPTION DE FLOU
Abstract
(EN)
The invention relates to a method for characterizing a perception of blur by a subject (10) in order to determine a dioptric blur value for an image (C) observed by the subject. The image has a blur generated by the low-pass filtering of the image components in accordance with the respective space frequencies of said image components. An indication of the perception thereof of blur in the image is provided by the subject and is associated with the dioptric blur value. Several images associated with different dioptric blur values are used for defining a dioptric blur threshold value for the subject that corresponds to a blur perception criterion. The invention can be used for adjusting the design of a progressive lens for the subject in accordance with the sensitivity to said visual blur of said subject.
(FR)
Un procédé de caractérisation d'une perception de flou par un sujet (10) permet de déterminer une valeur de flou dioptrique pour une image (C) qui est observée par le sujet. L'image possède un flou produit par filtrage passe- bas de composantes d'image, en fonction de fréquences spatiales respectives des dites composantes d'image. Une indication de sa perception du flou dans l'image est fournie par le sujet, et est associée à la valeur du flou dioptrique. Plusieurs images associées à des valeurs différentes de flou dioptrique permettent d'encadrer une valeur-seuil du flou dioptrique pour le sujet, qui correspond à un critère de perception du flou. Le procédé permet d'ajuster le design d'un verre progressif qui est destiné au sujet en fonction de la sensibilité dudit sujet au flou visuel.
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