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 146
. d Sin. r.In words, the tangent of the horizontal angle we wish tomeasure, through which the false image is misplaced, is themultiple of the sine of the angle through which the prismhas been rotated, and the tangent of the angle by which itdeflects rays of light. CLINICAL APPLICATIONS IN… … Fig. 57.—A double prism. bases. The patient, shutting the left eye, holdsthis prism before the right one and looks throughit at a flame, two images of which are seen, one aboveand one below the real position of the flame.Nothing is easier than to place the prism so thatthe two images appear…
Lenses
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
