Rimless spectacle lens bore polishing method and apparatus
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United States of America Patent
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Jun 1, 2010
Grant Date -
N/A
app pub date -
May 20, 2009
filing date -
May 20, 2009
priority date (Note) -
In Force
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Abstract
A method and apparatus for improving the performance of rimless spectacle lenses. An abrasive wire is provided for polishing bore holes which are drilled in lenses. The abrasive wire includes a wire substrate with abrasive particles embedded along its length. The wire and particles are dimensioned for threading through the bore hole and allowing space to perform a soft-filing operation. By polishing the micro cracks formed during drilling, propagation leading to lens failure which arises from spectacle use can be reduced.
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