Cystic and dermoid tumours of the eye / by S. Osborn.

  • Osborn, Samuel.
Date:
[1875]
Catalogue details

Licence: Public Domain Mark

Credit: Cystic and dermoid tumours of the eye / by S. Osborn. 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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    CYSTIC AND DEEMOID TUMOUES OP THE EYE. By S. OSBORN, SURGICAL REGISTEAE. It appears somewhat like a work of supererogation to attempt to say anything more upon cysts of the iris, since the subject has been already so thoroughly treated by Mr. Hulke in a mono- graph published in the * Royal London Ophthalmic Hospital Reports' of 1869. But it has occurred to me that the origin of this disease may, in certain cases, bear a different explanation from what has hitherto been given. My object in this paper is to inquire whether cysts may not occasionally be due to a dilatation of some portion of the obliterated remains of the ocular cleft. Dermoid tumours in like manner, I believe, take origin from the same. I have endeavoured to substantiate in the following details my reasons for these opinions. Firstly, as regards the situation of the ocular cleft, and its imperfect closure, called coloboma; then as to the structure, situation, time of appearance, and cause of these tumours. In the development of the eye it will be remembered that an invagination of the cuticle takes place, firstly, into the primary optic vesicle, and becoming shut off forms the lens ; and again, subsequently, another invagination of the cuticle takes place from below upwards to form the secondary optic vesicle, the root or neck of the invaginated portion gradually becoming shut off from above downwards by the gradual occlusion of this