Contrast chart apparatus, contrast sensitivity measuring...

Details Contrast chart apparatus, contrast sensitivity measuring... Contrast chart apparatus, contrast sensitivity measuring...

A - Human Necessities

61

B

A61B 3/028 (2006.01) A61B 3/032 (2006.01) A61B 3/06 (2006.01) A61B 3/11 (2006.01)

Patent

CA 2438109

A contrast chart apparatus includes a contrast index showing block for showing at a predetermined timing a contrast index for checking the contrast sensitivity, a pupil data measuring block for forming an image in front of the eyes of a person to be tested and measuring the pupil diameter of the eyes, a measurement timing forming block for forming in accordance with the aforementioned timing, a measurement timing of the pupil data measurement block.

L'invention concerne un appareil d'échelle de contraste comprenant un bloc d'affichage d'indice de contraste destiné à présenter, à une vitesse déterminée, un indice de contraste afin de tester la sensibilité au contraste, un bloc de mesure de données sur la pupille destiné à former une image à l'avant des yeux d'une personne examinée et à mesurer le diamètre de la pupille des yeux, et un bloc contrôlant la rapidité des mesures, destiné à mettre en oeuvre, selon la vitesse mentionnée, une vitesse de mesure du bloc de mesure de données sur la pupille.

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