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 71
sm. Projection of Faint Imageon a scale. 1° 3° 4 2° 6° 9 3° 9° 14 4° 12° 21 5° 15° 27 6° 18° 34 56 Chapter VIII, CLINICAL PROPERTIES OF PRISMS. The only clinical use of prisms is to change thedirection of the rays of light, but this is fruitful inits secondary applications. Prisms always producean… … Fig. 27.—To shew how an object at (0) appears displaced, not in the direction d towards the apex (a), but in the direction e towards the edge (be), and parallel to the base-apex line (a/). apex, their thickest part the base, while animaginary line between the apex and base may becalled the…
Lenses
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