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ABO NOCE Basic Opticianry

Category - Ophthalmic Optics

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Which lens is recommended for drill mounted frames?

Trivex
CR-39
Polycarbonate

Explanation

Answer: A - The best lens today for a drill mounted frame is Trivex.

Trivex has an index of 1.53 and is far superior in tensile strength to polycarbonate. Before Trivex, polycarb was the choice for a drill mounted lens.

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