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 99
respect-ively upwards and downwards. By these innerva-tions, which need not detain us, the visual axes canbe simultaneously moved in any direction, but werethere no other innervation, we would see all nearobjects double, from inability to converge the visualaxes upon them. This want is supplied by… … Fig. 42.- The three grades of convergence in vision for -25m.1 o scale : half life size. THE STUDY OF CONVERGENCE. 85 accommodation are intimately intersusceptible, sothat the slightest impulse to either makes adifference in the other, albeit the difference is notnecessarily equal in amount. If one…
Lenses
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