A guide to the practical study of diseases of the eye : with an outline of their medical and operative treatment / by James Dixon.

  • Dixon, James, 1813-1896.
Date:
1859
Catalogue details

Licence: Public Domain Mark

Credit: A guide to the practical study of diseases of the eye : with an outline of their medical and operative treatment / by James Dixon. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    Fig. 4. A front, and fig. 4' a side, view of a little spatula, which may be used, after the operation of Extrac- tion, for adjusting the iris,—for returning it into the anterior chamber, in making an Artificial Pupil by Excision,—or for preventing a sharp fragment of metal, which has transfixed the cor- nea, from falling backwards into the anterior chamber, while attempts are being made to dis- lodge and extract it. The instrument resembles the spatula of Beer, but is of much smaller size. Fig. 5. Cilia forceps.—The spring of the blades should be so adjusted, and their extremities so formed, that, when firm pressure is made, the slightly rough- ened surfaces a b may be brought into complete contact, without any gaping of their points. Fig. 6. Cataract knife.—This instrument, the principle of which is explained at page 346, is commonly known as Beer's knife, although it has, since his time, undergone several modifications as to form and size. Fig. 6' shows the exact shape of the blade, as given in Beer's own work, Lehre von den A ugenhranhheiten ; 1817. Fig. 7. Cannula forceps.—The instrument is here repre- sented open, and at fig. 7' closed. In the latter state it is passed through an opening made in the cornea. By drawing back the disk a, attached to the cannula b, the points of the forceps are allowed to separate, and are then brought close together again by thrusting the cannula forwards. This to-and-fro movement is in most instruments effected by means of a trigger in the handle; but I prefer the simple contrivance here repre- sented, as being much less liable to accidental derangement.