Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers
A technical treatise on ophthalmic lens optics by Charles Frederick Prentice, published in Philadelphia by Keystone in 1900 for opticians and refractionists. The plates are line diagrams tracing rays through prisms, cylinders and lens systems, with dotted construction lines, lettered points and cone-shaped ray bundles in perspective — usable as geometric linework, optical schematics and axis notation.
