Regarding the posts on determining whether a lens is high index or not...or what the index is, heres a thought. Why not use a "wet" cell . A transparent plexiglass "holder" to simply drop the lens into. The cell is filled with water. (n=1.3375) The power before and after is read, the 2 indices are 1.00 and 1.3375, and calculate how much neutralisation has taken place. This should be quite accurate to determine index, and should work even with an asheric front surface. What do you think?
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