Doubts concerning the inversion of objects on the retina / by Marmaduke Berdoe.

  • Marmaduke Berdoe
Date:
1772
Catalogue details

Licence: Public Domain Mark

Credit: Doubts concerning the inversion of objects on the retina / by Marmaduke Berdoe. Source: Wellcome Collection.

    9/98 (page 5)
    y [5] at length arrived at the eye. Their princi¬ pal reafons were, lft, That the objeft Ihould necelfarily be conne&ed with the power of feeing, for as the objefl has no union of itfelf, it fhould be united to that fomething which reprefents it, and which comes from its fubftance by a perpetual egreflion. 2dly, That old men often fee objeffo which are far removed, better than thofe which are nearer to them. 3dly, They imagined that all vifible objefls imprinted a perfefl: image of themfelves, in the ambient air, and that this image form’d another ftill fmaller, that again forming another, till by a fucceffive feries of objeffs, they at length reached the cryftaline humor of the eye, which they con- lidered as the principal inftrument of vilion. -—This progreffion* correfponds with the fentiments of Ariflotle, in his chapter, de afpeflu. Although the chain of images imagined by the ancients has been con- % fidered as a chimera, yet the ideas of Ari-^ flotle may very wTell be reconciled to thofe of t