The hyaloid canal and its relation to cyclitic exudation / by Angus M'Gillivray.

  • M'Gillivray, Angus.
Date:
[1898]
Catalogue details

Licence: Public Domain Mark

Credit: The hyaloid canal and its relation to cyclitic exudation / by Angus M'Gillivray. 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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    dition was observed (vide photograph) : From the posterior por- tion of the ciliary body all round, a filmy semi-transparent conical expansion was seen extending backwards into the vitreous cavity like a vertical section of a bell-tent. From the apex a narrow band about '50 mm. in diameter extended backwards, expanding into a small cone, the base of which was firmly adherent to the optic disc. The vitreous, although some- what fluid, was in situ, and there was no detachment of the retina. At first sight the condition was suggestive of a per- sistent hyaloid artery, but on closer inspection it was found that the band running backwards through the vitreous cavity was solid and directly continuous in front with the ciliary body. This, together with the clinical history, points to its being a cyclitic exudation, which had filled the patellary fossa, hyaloid canal, and area Martegiani. In the other specimens shown the same appearance was observed, but in all of them the large conical expansion, cor- responding to the retraction of the patellary fossa, was more dense, the cyclitis being very much more severe. The condition is interesting as showing the patency of the hyaloid canal pathologically, instead of by injections of coloured fluids as already described. It may also explain many of the so-called cases of persistent hyaloid artery seen ophthalmoscopi- cally. In many of these cases it is probable that the appearance seen with the ophthalmoscope is simply an exudation cast which has extended either backwards from an inflamed ciliary body- cyclitis, or forwards from an inflamed optic nerve-optic neuritis.