Downward Eyeball Movement Measuring Jig, Jig Affixing Device, and Downward Eyeball Movement Measuring Method
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United States of America Patent
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Issued Date -
Feb 3, 2011
app pub date -
Jun 21, 2010
filing date -
Jul 30, 2009
priority date (Note) -
Abandoned
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Abstract
A downward eyeball movement measuring jig which measures downward eyeball movement corresponding to a distance between a distant eye point and a near eye point of a spectacle lens attached to a spectacle frame to be worn by a wearer of the spectacle lens includes: a mask which is provided on the surface of an examination spectacle lens attached to the spectacle frame and has a reference line passing the distant eye point and extending in the horizontal direction.
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