Vision shift amount measuring method and vision shift amount measuring jig
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United States of America Patent
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Oct 22, 2013
Grant Date -
Jun 30, 2011
app pub date -
Dec 17, 2010
filing date -
Dec 29, 2009
priority date (Note) -
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Abstract
A vision shift amount measuring method includes: forming a reference mark indicating a distance eye point on a surface of a spectacle lens attached to a spectacle frame practically worn by a wearer, and forming a plurality of opaque lines in an area expected to contain a shifted vision on the surface of the spectacle lens with a predetermined space between the adjoining lines; and allowing the wearer wearing the spectacle frame to select the line closest to a position through which the vision passes from the plural formed lines.
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