The clinical use of prisms; and the decentering of lenses (1893)
Maddox, Ernest Edmund, 1860-1933 · Bristol : J. Wright ; London : Simpkin, Marshall, Hamilton, Kent · leaf 123
t is not so. Fig. 53, B, represents a decentredlens, the action of which is precisely similar to aprism and lens, for, as said before, it is as if thelens were split in two, and the prism shewn indotted outline were inserted between the twohalves. Now it will be evident at a glance, that theangle… … Fig. 53.—A. The right eye is looking at a distant objectthrough a lens displaced inwards, rim and all, by a distance od;d c e is the effect on convergence. B is the same eye lookingthrough a lens of the same focal length, but decentred in itsrim by the same distance 0 d. The dotted lines indicate…
Lenses
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