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  • Compact keplerian optical systemUS8057033 *17 Feb 200515 Nov 2011Essilor InternationalOphthalmic lens and a display including such a lens and an optical imagerUS8157663 *6 May 201117 Apr 2012Joseph WinkelsasHead alignment trainerUS861100410 Jun 201117 Dec 2013Spaario Inc.Optical system providing magnificationEP1073924A1 *14 Apr 19997 Feb 2001Surgical Acuity, Inc.Magnification viewer* Cited by exam
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