Report of the fourth international ophthalmological congress, held in London, August, 1872 / published by a committee composed of G. Critchett [and others] ; the papers arranged, and the text and translations revised by Henry Power.

Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Report of the fourth international ophthalmological congress, held in London, August, 1872 / published by a committee composed of G. Critchett [and others] ; the papers arranged, and the text and translations revised by Henry Power. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    Mr. Brudenell Carter : I am anxious, Sir, with your per- mission, to say that I have had this precise scale in use for three years, and I have found it work with the greatest possible con- venience to myself; but it has the inconvenience of having to be translated into inches for the mechanicians. The scale itself is admirable. I cannot too strongly recommend the Congress to adopt it unanimously. M. Donders: This, then, is the reply given by the Committee on this subject nominated in Paris. It is desirable that after a certain date—say July, 1873—the above data will be employed. Mr. Wells will have the kindness to read the proposition to us. Mr. Soelberg Wells did so. M. Meyer : It would be desirable, before the publication of this scale with strong glasses, that the fraction of the same numbers should be harmoniously arranged. A Member: Before you lay down this table as law I would beg to mention the confusion M. Donders : There is no question of law. A confusion cannot, therefore, occur. The subscribers merely signify their intention to adopt this scale, without being under any further obligation. M. Schmidt will now be good enough to favour us with his contribution regarding the neuritis optica intraocularis occurring in tumours of the brain, and the consequent oedema of the optic-nerve sheath. M. Schmidt : I was unfortunately absent when M. de Wecker's paper was read, or I should have asked leave to make some observations in regard to the origin of the “ stauungs papille,” which is met with in cases of tumour of the brain. The important injection-researches of M. Schwalbe, as is well known, first demonstrated that a communication exists between the sub-arachnoid space and the sheath of the optic nerve. I am able to corroborate his statements, and have further observed that even in cases where the presence of coloured fluid in the subvaginal space of the optic nerves was hardly demonstrable, a greater pressure existed close to the bulbus, and that even an injection of the lamina cribrosa was possible. The latter, indeed, but rarely succeeds; at least, recent experiments by myself and others have only yielded negative results. My view of the origin of the “ stauungs papille,” based upon these experiments, was obvious. An increase of the intracranial pressure must force fluid from the arachnoid into the sheath of the optic nerve, and