Concerning persistent pupillary membrane, and its frequency / by Sydney Stephenson.

  • Stephenson, Sydney, 1862-1923.
Date:
1893
Catalogue details

Licence: Public Domain Mark

Credit: Concerning persistent pupillary membrane, and its frequency / by Sydney Stephenson. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    2 The capsulo-pupillary membrane, on the other hand, arises from the corona, and is inserted into the capsule of the lens, with or without a terminal plaque. The only example of capsulo-pupillary membrane in- cluded among my sixty-eight cases was in a boy twelve years of age. Three brownish filaments, arising from the inner half of the corona, were attached to a small grey opacity situated over the anterior pole of the left lens (Plate VI, fig. 1). The remaining sixty-seven cases were examples of pupillary membrane pure and simple, and all fell into one or other of the three following groups, arranged in order of frequency. To be strictly accurate, the fact should be noted that a few of these cases did not preserve in their entirety the characteristics of their particular group. These anomalous examples have been classified, however, in accordance with their salient features. 1. A filament or filaments traversing the pupillary area in various directions (Plate VI, figs. 2, 3, 4, 5, and 6). These threads invariably arose from the corona, and were often so extremely fine as to need a magnifying glass to bring them into full view. In three instances two threads united in front of the pupil, so as to form a Y-shaped figure; in three others more than two filaments were pre- sent ; but in the majority of cases a single strand only was observed. The filaments usually subdivided at either end. Their colour generally resembled that of the iris, some- times in their whole length, but more often at their ter- minal points alone. Small nodules, varying from one to six in number, were present in the course of the filaments in nine instances. The first group included forty cases. 2. Filaments with a festoon-like arrangement, joining adjacent parts of the corona (Plate VI, fig. 7). This second group comprised fourteen cases. 3. A single filament attached at one end to the corona, with the other end free in the aqueous humour (Plate VI, figs. 8 and 9). Thirteen cases were comprehended under this section.