Observations and cases relating to the operation for artificial pupil; in a letter from Mr. Maunoir of Geneva, to Professor Scarpa of Pavia, with the professor's answer / communicated by Dr. Marcet.

  • Alexander Marcet
Date:
[1816]
Catalogue details

Licence: Public Domain Mark

Credit: Observations and cases relating to the operation for artificial pupil; in a letter from Mr. Maunoir of Geneva, to Professor Scarpa of Pavia, with the professor's answer / communicated by Dr. Marcet. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

    585/594
    eye will now fee an objed diftinaiy^ which is only about feven inches from it, and my right eye will at the fame time fee ^n objed diftindly, the diftance of which is about ten inches. I find alfo, that my left eye is made to fee an objedj diftindly, though placed more than nineteen inches from it, if I dired both axes to a point Ml more remote. 2. I formerly mentioned, that every degree of the mutual inclination of the optic axes is attended, by a particular Hate of the refrading power of each eye. But I muft now remark, that thefe ftates are fometimes fubjed to flight variations, while the inclinations of the optic axes to each other remain the fame. For I find, that, when a luminous point, to which both axes are turned, is diftindly feen by my left eye, I can, by certain efforts not eafi]^ to be defcribed, but without changing the pofition of either axi?, make it afterward appear as a furface, and this too, at one time, from the rays coming to a focus top foon, and at another, too late, for perfed ^ vifion
    digitised image 1
    digitised image 2
    digitised image 3