| http://www.w3.org/ns/prov#value | - In this embodiment of the invention, the plastic tube 41 functions to retain the lens assembly in rolled-up conformed condition, and this entire assembly of plastic tube 41 and lens assembly is then sealed within a liquid-tight pouch 44 that may be fabricated from any appropriate material, including plastic, and which has its peripheral edges 46 sealed against the entry of air or the egress of a s
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