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]

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)

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$« It was now evident, however, that it was ne- cessary to extract the crystalKne, and that if I en- larged the pupil with my blunted scissors, it could: only be by cutting the iris in the upper part of itsi disc, an operation which would render the extrac- tion of the crystaUine difficult, and even perhaps: impossible, since it was probable that some extra- neous substance would adhere to it. In conse- quence of these considerations, I made my decision! instantly, and performed the operation in the fol- lowing manner: I first made an incision in the lower part of thei cornea j then introducing the point of my instru. ment into the lower part of the iris, the puncture gave me an opening of the size of a pin's head, sufi ficient to allow the passage of one of the blunted points of my scissors, with which I cut the narro\w strip comprised between the hole caused by th^ knife and the natural pupil; I then obtained imi mediately a pupil of a good size, and which exhii bited a crystalline humour of a whitish grey coloun Then observing that the compression which I elH ercised upon the eye appeared in no degree tc move the crystalline, I passed behind it a ver; small scoop, arid drew it out of the eye by thii means, with the greatest facility. The pupil w^ then of a perfect black, but the white spot hr changed its situation and now obstructed the lij of the wound in the cornea. After having eridei voured in vain to remove it with the scoop, I w 3$