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Introduc.DIr
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00077_Field_77.txt
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1997-10-29
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379b
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16 lines
RGP CYLINDRICAL PRISM STABILIZED LENSES
Rigid prism stabilized lenses are
manufactured with the cylinder
generated on the front surface.
Prism ballasted lenses may be
truncated, that is a portion of
the edge is removed giving a
ΓÇ£flatΓÇ¥ side to the lens. This,
in addition to the prism, helps
maintain rotational stabilization
of the lens.