| http://www.w3.org/ns/prov#value | - I have been recommended to not wear lenses for more than 8 hours a day, so I still have to keep a pair of glasses to hand, but really, this is a must anyway...if one gets a stye or other eye infection, or even a nasty cold that makes the eyes go red and possibly even slimy, then wearing lenses is a huge no no anyway.
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