Ophthalmic and otic memoranda / By D.B.St. John Roosa ... and Edward T. Ely.

  • Ely, Edward T. (Edward Talbot), 1850-1885
Date:
[1885]
Catalogue details

Licence: Public Domain Mark

Credit: Ophthalmic and otic memoranda / By D.B.St. John Roosa ... and Edward T. Ely. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    HO CONICAL CORNEA. by passing knife through long diameter of tumor and allowing edges to fall together and unite, with view to producing flatter cicatrix. Excision performed by cutting tumor off at its base and allowing edges of wound to col- lapse and cicatrize. Critchett's operation [Critchett, London, igtn Cent.] consists in passing several curved needles armed with silk through base of tumor and cutting latter off just in front of them. Needles are then drawn through and sutures tied so as to unite edges of wound and form flat stump for arti- ficial eye. Operation dangerous from risk of sympathetic ophthalmia if needles go through ciliary region. Enucleation often preferable : always indicated where there is so much ciliary irritation as to endanger fellow-eye. Conical Cornea : Kerato-conus : is a cone-shaped staphylomatous protrusion of cornea whose cause is not well understood. Cornea is thinned and less resistant, but intra- ocular pressure is generally not increased and is sometimes below normal. Affection comes on as a rule very slowly, and without pain or irritation : may remain slight or advance to high degree, in which apex becomes extreme- ly thin and is apt to be clouded—but it never bursts, except from violence. First thing no- ticed by patient is impairment of vision, as eye becomes myopic from lengthening of axis, and astigmatic from irregular curvature of cornea. In high grades, astigmatism causes