A treatise on the principles and practice of ophthalmic medicine and surgery / by T. Wharton Jones.

  • Jones, Thomas Wharton, 1808-1891.
Date:
1865
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the principles and practice of ophthalmic medicine and surgery / by T. Wharton Jones. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    kg I to Thi (hesk G62 PINGUECULA. ' Operation for the removal of pterygium.—The pati( being seated as for the operation for cataract, and be eyelids secured by an assistant, or held apart by 1 spring-wire speculum, the surgeon, while the patic turns the eye outward, if the pterygium be on the na side, with a hooked forceps seizes the pterygium abc its middle, and, whilst keeping it raised from the surfz of the sclerotica, passes a cataract or iris-knife with t \m] edge towards the cornea, and one of the flat surfaces the blade towards the sclerotica, behind it, and detacl it fi •om the sclerotica by cutting outwards as far as tf margin of tho cornea, where the knife is' to be made cut itself out. Still keeping hold of the pterygia with tho forceps, he now with the same knife, or wi a pair of curved scissors, separates the pterygium t wards its base, where it is to be cut away without e: croaching too near the semilunar fold, if it be an intern pterygium. Instead of such an extensive romoval, it will be foun in most cases, sufficient to seize the pteiygium with £ forceps near the cornea, in such a manner as to raise up in a fold; and then, with a pair of curved scissors, snip away the apex part of it. Tho base part of the pterygium does not require to 1 interfered with. The semilunar fold, especially, must 11 left untouched. 2nd.—Pinguecula. * This is a small whitish-yellow tumour, from the size a pin's head to that of a small pea, in the sclerotic coi junctiva and subjacent cellular tissue, close to the margi of the cornea on its nasal or temporal side. It is called from its being supposed to be a deposition of fa' though erroneously, as shown by Weller, who foun it to be of an albuminous nature. One or two of th fjj, rectal vessels, enlarged and varicose, usually rxt jjj, into it. Pinguecula, which is of very common occurrence to wards the middle period of life, can scarcely be viewe ^ as morbid, inasmuch as it occasions no inconvenience c any kind. When its removal is required, it is only fo the sake of appearance. Being seized with a hooked for Jen mti lot * Pterygium pingue.