A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 3/02 (2006.01) A61B 3/036 (2006.01)
Patent
CA 2472382
An optometric apparatus and an optometric method capable of performing optometry and coping with an examinee having an astigmatic eye by using a computer screen without requiring a special facility. Attributes of the examinee are acquired and an astigmatic axis judgment chart is displayed on the computer screen, so that the direction selected by the examinee is acquired. An eyesight measurement chart is displayed for the acquired direction and the direction orthogonal to that, so that an observation limit selected by the examinee is acquired. A far point distance is calculated from the acquired observation limit. A diopter is calculated by using the acquired direction and the acquired two far point distances.
L'invention concerne un appareil et un procédé permettant une mise en oeuvre d'optométrie et de prendre en charge un sujet astigmate à l'aide d'un écran d'ordinateur sans recours à une installation spéciale. Les caractéristiques du sujet examiné sont acquises et une courbe de d'appréciation d'axe astigmatique est présentée sur l'écran de l'ordinateur de façon à acquérir la direction choisie par le sujet examiné. Une carte de capacité visuelle concernant la direction acquise et la direction qui lui est orthogonale est affichée de façon à acquérir une observation limite choisie par le sujet examiné. Une dioptrie est calculée à l'aide de la direction et de deux distances ponctuelles éloignées acquises.
Toshima Akio
Yoshida Takehiko
G. Ronald Bell & Associates
Vision Optic Co. Ltd.
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