gged Accurate Easy-to-Use Low-Cost Confidential to OptiOpia April 1, 2011 Presentation to Jeffrey Epstein 12 EFTA_R1_02019392 EFTA02688203 Scheiner Double-Pinhole Principle Two parallel beams of light intersect at a single retinal locus in emmetrope and in ametropia at 2 loci with separation proportional to absolute va