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1. CA2521567 - MESURE DE LA DISTRIBUTION D'UN PIGMENT MACULAIRE

Office Canada
Numéro de la demande 2521567
Date de la demande 27.04.2004
Numéro de publication 2521567
Date de publication 11.11.2004
Type de publication A1
CIB
A61B 3/12
ANÉCESSITÉS COURANTES DE LA VIE
61SCIENCES MÉDICALE OU VÉTÉRINAIRE; HYGIÈNE
BDIAGNOSTIC; CHIRURGIE; IDENTIFICATION
3Appareils pour l'examen optique des yeux; Appareils pour l'examen clinique des yeux
10du type à mesure objective, c. à d. instruments pour l'examen des yeux indépendamment des perceptions ou des réactions du patient
12pour examiner le fond de l'œil, p.ex. ophtalmoscopes
CPC
A61B 3/14
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
3Apparatus for testing the eyes; Instruments for examining the eyes
10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
14Arrangements specially adapted for eye photography
Déposants MILLENNIUM DIET AND NUTRICEUTICALS LIMITED
Inventeurs BONE, RICHARD ANDREW
LANDRUM, JOHN THOMAS
Données relatives à la priorité 0310040.1 01.05.2003 GB
0330094.4 29.12.2003 GB
Titre
(EN) MEASUREMENT OF DISTRIBUTION OF MACULAR PIGMENT
(FR) MESURE DE LA DISTRIBUTION D'UN PIGMENT MACULAIRE
Abrégé
(EN)
Apparatus for use in measuring the density and spatial distribution of macular pigment in an eye comprises a camera (4) for capturing a colour image of an eye, at least one filter (36) for filtering light reaching the camera (preferably by filtering the light illuminating the eye). The filter (36) has a transmission spectrum with one peak in the region of light absorbed by the pigment and another peak in a region where no such absorption occurs. The filter increases the sensitivity of the camera to macular pigment whilst enabling the effect of other pigments to be reduced or eliminated. A method of measuring macular pigment involves obtaining a colour image of an eye, the image having two colour components each having a spectrum having a respective one of said peaks. Corresponding portions of the components are mathematically combined so as to provide a measurement of macular pigment density and the results of the combination are used to provide an output representative of the contribution of macular pigment to the image.