Accommodation (eye)

Definition and stakes

C. Schweigger,  Clinical Investigations on Squint

“ In looking even at distant objects he must overcome his hypermetropia by exerting his accommodation, and in proportion as the object approaches him, he must add to it as much accommodation as the normal emmetropic eye would use. The inspection of near objects requires then a special amount of exertion. There exists, however, a certain connection between accommodation and convergence of the visual lines. The stronger one converges the more one has to put into action the accommodation. A certain tendency to convergence cannot then be absent during any effort of the faculty of accommodation. ”
Source: Gutenberg

Richard Liebreich,  Popular Science Monthly (1872)

“ The capacity of the eye to accommodate itself to different consecutive distances, so as to receive on the retina distinct images of objects, is called accommodation. This faculty depends upon the power of the crystalline lens to change its form. The accommodation is at its greatest tension if we adapt our eye to the nearest point. It is, on the contrary, in complete repose if we adapt it to the farthest point. The optical state of the eye during its adaptation for the farthest point, when every effort of accommodation is completely suspended, is called its refraction. ”
Source: Wikisource

William James Miller,  Wintering in the Riviera

“ Notwithstanding all the elegance of the public portions of the houses, and perhaps even of the private chambers, it seemed as if the actual comfort of the inhabitants could not be great, and especially in the matter of bedroom accommodation, for I imagine the sleeping-rooms were of the smallest dimensions—mere closets, not such as people of the present day in good circumstances would approve. ”
Source: Gutenberg

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