An essay on the malformations and congenital diseases of the organs of sight / by W. R. Wilde.

  • Wilde, W. R. (William Robert), 1815-1876.
Date:
1862
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Licence: Public Domain Mark

Credit: An essay on the malformations and congenital diseases of the organs of sight / by W. R. Wilde. 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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    week, and which, so far as I know, hps never been observed pre- viously. In the centre of each lens there is a whitish cruciform mass, the outline of which presents an exl;^'aordinary amount of regularity. Towards the extremity of each limb of this figure, and somewhat deeper in the clear substance of the lens, may be seen small triangular pin-head opacities, and near the upper and outer limb on the right side, there are three white specks. Vision is imperfect, but the child is well-formed and healthy. Very rarely, indeed, do we observe a small circular opacity in the centre of the lens; and when we do, it is very difficult to give it the proper expression. The accompanying drawing is the nearest approach to it. which an illustration in wood can ef- fect. Seiler says, that although the central cataract is usually white throughout, he has seen it annular, with a transparent spot in the middle ; and he has figured this appearance in the plate attached to his work already referred to, see figure xi. ^ Posterior Lenticular Cataract.—Opacities upon the poste- rior capsule of the lens, if not often seen by some of the older authors, were at least believed to be of frequent occur- rence. Many years ago, I observed a yellowish spot, with a few radiating fibres, very deep, in each lens, in a middle- aged man. I had a very careful drawing made of the ap- pearance which the eyes then presented. In the course of about three years, the entire body of each lens became opaque. I extracted them, and demonstrated to those present upon each occasion, the opacity upon the apex of the posterior surface of the lens; and, when the section of the cornea had healed, showed that there was not the slightest opacity remain- ing upon the capsule. The man worked many years subse- quently as a shoemaker. Since then I have seen many such