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Soft
DW & EW lens materials are basically the same, & so
too are their permeability. In EW, low oxygen & insufficient
soft lens hydration & cleanliness during sleep increases
significantly the probability of infections & inflammatory
tissue reactions in relation to the continuous duration of
wear Microbial Keratitis is 10-15 times more common with EW
as with DW. The vast majority of contact lens clinical researchers
advise most patients against soft lens EW, except for occasional
periods of short duration.
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