Ophthalmic lenses, dioptric formulae for combined cylindrical lenses : the prism-dioptry, and other optical papers (1900)
Prentice, Charles Frederick, b. 1854 · Philadelphia : Keystone · leaf 167
Fig. 3. Fig. 4. By more widely separating the lens centers (-I-), it will be observed thatthe disconnected portion of the line LL^ as seen through the lenses, willappear displaced to a lesser degree, and, if the upper concave lens 2.5 D. CEMENTED BI-FOCAL LENSES SOLVED BY THE PRISM-DIOPTRT. 159 is…
Lenses
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