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Q1: Determine the prismatic effect for the following spectacle lenses. What is the base direction if the point c is above the optica centres? RE:
Q1: Determine the prismatic effect for the following spectacle lenses. What is the base direction if the point c is above the optica centres? RE: +2.00 DS LE: +4.50 DS C= 7.5mm PRE = 0.75 x 2.00 = 1.504 PLE = 0.75 x 4.50 = 3.3754 Base down
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