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Start Over Collections Medicine in the Americas, 1610-1920 ✖Remove constraint Collections: Medicine in the Americas, 1610-1920 Subjects Refraction, Ocular ✖Remove constraint Subjects: Refraction, Ocular Titles A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents ✖Remove constraint Titles: A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents

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  • A treatise on simple and compound ophthalmic lenses: their refraction and dioptric formulae, including tables of crossed cylinders and their sphero-cylindrical equivalents1