On the origin of ruptures in detached retinae / by E. Treacher Collins.

  • Collins, E. Treacher (Edward Treacher), 1862-1937.
Date:
[1896]
Catalogue details

Licence: Public Domain Mark

Credit: On the origin of ruptures in detached retinae / by E. Treacher Collins. 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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    RaeWmann* recently has returned to the older view that detachments primarily are due to exudations from the choroidal vessels. He meets de Weeker's objection by pointing out that the exuded serous fluid can become mixed with abnormally fluid vitreous by a process of diffusion through the retina. This diffusion occurs accord- ing to the ordinaiy physical law,—that is to say, a larger quantity of less albuminous liquefied vitreous passes outwards into the subretinal space, than of more albu- minous choroidal serous exudation passes inwards into the vitreous chamber. It is in this way, he argues, that a detachment tends to extend. He brings forward experimental evidence in support of his views, and urges many difficulties to the acceptance of Leber's theory. He believes the ruptures in the detached retinae to result from the tension of fluid behind the retina, as Graefe did. When the tension on the outer side of the retina becomes, as the result of diffusion of more fluid outwards than inwards, greater than on the inner side, it, he argues, gives way, the edges of the rent being naturally carried inwards. In 1892, Elschnig of Graz,t from the examination of two cases clinically, put forward a new theory with regard to ruptures in detached retinae. He supposes in the first place that there has been a patch of retino-choroiditis, and that the retina and choroid have in that position become firmly adherent. Such patches are often met with in highly myopic eyes. Subsequently when the detachment of the retina occurs, the piece of retina attached to the choroid remains adherent and becomes torn away from the rest of it; a hole is thus formed in the detached portion. The first case which suggested this theory to him was that of a student who had received a.n injury to his eye from a fencing foil ; a detachment of the retina com- * 'Arch. f. Augenheilk.,' Bd. xxvii, s. 1. t ' Kliu. Mouatsbl. f. Augonheilk.,' Bd. «x, 8. 416.