| http://www.w3.org/ns/prov#value | - In exemplary embodiments, the plurality of lenses 150 may be comprised of a borosilicate glass or other silicate glass, or a plastic such as polystyrene latex, although any of myriad types of materials may be utilized, including without limitation, other types of glass, plastic, other polymers, crystals or polycrystalline silicate glass, and/or mixes of different types of materials, in any shape o
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