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00062_Field_62.txt
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1997-10-28
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372b
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13 lines
LENS DESIGN
EDGE THICKNESS
A minimum edge thickness
must be maintained so that
the edge does not chip or
tear and is comfortable.
The minimum edge thickness
for RGP lenses is usually in
the range of 0.08 mm to 0.12 mm and may be a little thinner with hydrogel lenses. It becomes greater with higher minus lenses.