Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Taketoshi Suzuki0
Date of Patent
April 15, 2008
0Patent Application Number
104877840
Date Filed
August 23, 2002
0Patent Primary Examiner
Patent abstract
An eye test chart includes a visual target for multiple test purposes composed of patterns of combinations of at lest two or more kinds of colors and predetermined shapes that are arranged at predetermined positions on an image area corresponding to visual field regions to be examined. Color vision defects and their abnormal regions can be identified as a result of a subject's visual identification of the visual targets arranged at the predetermined positions.
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