Microphthalmos with cystic protrusion from the globe / by E. Treacher Collins.

  • Collins, E. Treacher (Edward Treacher), 1862-1937
Date:
[1897]
Catalogue details

Licence: Public Domain Mark

Credit: Microphthalmos with cystic protrusion from the globe / 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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    8 Speaking generally, the larger the amount of the retinal protrusion, the smaller and more imperfectly developed is the eyeball. When the protrusion is not very extensive the eyeball may present little external evidence of malformation beyond its defect in size. The lens and vitreous may also appear quite normal (Case 1, f Trans. Ophth. Soc./ vol. xiii, R. eye). On the other hand, there are numerous congenital defects of the eye which may exist together with this protrusion of retina. The cornea may be exceedingly small, out of proportion to the rest of the globe, and in addition to being small, opaque, with blood-vessels coursing through its anterior layers (Lang's [2] case; Case 2, ' Trans. Ophth. Soc.,5 vol. xiii; Cases 1 and 2 in this paper). The foetal cornea in no stage of its development has any blood-vessels formed in it, so that this vascularisation of the cornea is not simply a persistence of any foetal condition. In one case the cornea was abnormally large for the size of the globe, and globular, as in buphthalmos (Rolston's case). The sclerotic is usually unduly thick, and in some cases there exist embedded in it plates or nodules of well-developed hyaline cartilage (Case 2 in this paper (Fig. 2) ; De Lapersonne [4] ; Mitvalsky [6] ). This formation of hyaline cartilage in the sclerotic is very remarkable, and the only thing I know with which to associate it is the sclerotic of a bird in which normally hyaline cartilage exists, somewhat comparable in its arrangement to that in one of my cases.* The iris, besides being small, may present no con- genital deficiency (Case 1 in this paper; Case 1, ' Trans. Ophth. Soc.,' vol. xiii, R. eye). Bands of pupillary membrane may be persistent (Case 1 in this paper ; Case 1, ' Trans. Ophth. Soc.,' vol. xiii, R. eye), or there * Mr. Marcus Gunn has called my attention to a description of the eye of the Ornithorhynchus paradoxus, or duck-mole, published by him in the 'Journal of Anatomy and Physiology,' vol. xviii, p. 400, in which he mentions plates of hyaline cartilage existing in the sclerotic.