On the operative treatment of strabismus / by A. Freeland Fergus.

  • Fergus, A. Freeland (Andrew Freeland), 1858-1932
Date:
1900
Catalogue details

Licence: In copyright

Credit: On the operative treatment of strabismus / by A. Freeland Fergus. 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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    the divided muscle much impaired, while along with these changes there is a certain amount of exophthalmos. Occasionally also after tenotomy there is marked divergence. Particularly is this true when the operation has been done during the administration of a general anaesthetic. It occurs in a very considerable percentage of cases, and in the hands of even the best operators. A hideous divergent squint after tenotomy is not always the result of bad operating, although it is often supposed to be so, but in many cases is a natural sequence of the operation selected. 4. In many cases the squint is not apparently diminished by the tenotomy. No doubt accurate and careful measure- ments would reveal a certain diminution in the angle of the squint, but the disfigurement caused by the squint is not appreciably lessened. Such were the objections which I advanced to tenotomy for squint. It is my present purpose to give a few diagrams of certain cases before and after operation. These have, possibly wTith one exception, been made from negatives taken by myself. The earlier negatives were made with an ordinary camera, but the more recent with the apparatus devised by Maddox. It is impossible to teach any part of surgery clinically by diagrams, and no competent teacher will attempt it. What would be thought of a surgeon who, teaching clinically, instead of showing actual cases and operations, contented himself with mere pictorial representations ? Hence I regret that in the present communication I have to fall back on so crude a method as the exhibition of photographs. It is impossible that by the inspection of these anything like clear information can be obtained. It is impossible on a lantern slide to measure fields of fixation or the range of the convergence. Moreover, a picture can never reproduce nature. As thrown on the screen, however, these pictures have one advantage; they are considerably magnified, so any defects are more easily seen and good results more readily identified. Before any absolute conclusion can be drawn as to the eyes being placed bilaterally symmetrically, it is necessary to have B
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