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.

    11/98 page 7
    mena of the reprdentations of objeds in the camera obfcura. The rays of light refleded from the furfaces of objeds, ftrike on the external membrane of the eye, and palling thro' the different humors of this organ, they are fubjeded to different refradions before they can flimulate the retina. The impref- fions made on this expanfion of the optic nerves, are conveyed to the fenforium-com- mune. i \ * v l ’ 1 » 1 The inverfion of the objeds perceived by John Baptifl Porta, in the camera obfcura, and the experiment made by Kepler with the eye of a calf or ox, (deprived of its ex¬ terior membranes, and applied to the hol$ thro' which the rays of light enter into the room,) fubjeded the laws of vifion to a very great inconvenience, of which the ancients had not the leaft idea. Kepler perceived in the eye the inverted fituation of objeds on the retina; he faw them inverted alfo on the wall of the camera obfcura, from which he
    digitised image 1
    digitised image 2
    digitised image 3