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00042_Field_42.txt
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1997-10-28
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681b
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WEARING SCHEDULES
EXTENDED WEAR
Another way some lenses are worn is on
what we call an extended wear schedule.
The lenses are put on and worn for more
than one day at a time. The patient sleeps
with the lenses on for up to a maximum
recommended time of one week, although
some patients may not comply and wear
them longer. In the U.S. the Food and Drug
Administration (FDA), which regulates
medical devices, has approved them for no
longer than a week without removal.
The reason there is this limitation is that the more days they are worn the greater the risk of corneal infections (ulcers) and other problems.