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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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