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Introduc.DIr
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00032_Field_32.txt
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1997-10-29
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HYDROGEL (SOFT) LENSES
Hydrogel lenses decrease the amount of
oxygen reaching the cornea as do most
contact lenses. By making the lenses
thinner or increasing the water content, or
both, more oxygen will reach the cornea.
It is not uncommon to have hydrogel lenses
made as thin as 0.035 mm.
Lenses are available up to about 75% water
content with most lenses being used today
in the range of 38% to 65% water.