| http://www.w3.org/ns/prov#value | - les 2 and 3 of the publication of the application as filed, the sum of the dioptric add powers of the lens surfaces is of 2 dioptres, whereas the total dioptric add power of the corresponding lens is, depending on the example, of 1.85, 1.90, 1.95 or 2.10 dioptres, i.e. a value that is close to, but not exactly equal to the sum of the dioptric add powers of the respective lens surfaces.It follows f
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