Lectures on diseases of the eye / By John Morgan; edited by John F. France.

  • John Morgan
Date:
1848
Catalogue details

Licence: Public Domain Mark

Credit: Lectures on diseases of the eye / By John Morgan; edited by John F. France. Source: Wellcome Collection.

    310/330 (page 280)
    Is intended to represent the steps of the usual operations for cataract. In the two first figures^ the knife (Wenzels^) is passed through the cornea obliquely from above downwards. In Eig. the point of the instrument has just entered the anterior cham¬ ber. In Eig. 2, the section is completed. Should the attempt at making the section as here delineated be prevented^ and it be necessary to enlarge an opening which has been made too small for the passage of the lens^, the best proceeding consists in completing the section with an extremely small probe-pointed and curved bistoury. This process is exhibited in Eig. 3. Eig. 4.—Transverse section of the cornea performed with BeeEs knife. Eig. 5.—Eepresents the mode of lacerating the Capsule of the Lens, by means of the finely pointed curved end of the curette, after the section has been completed. Eig. 6.—Operation for solution; the lens soft, and speckled; the needle passed through the cornea, and its point carried through the centre of the pupillary aperture, for the purpose of cutting up the capsule of the lens and its anterior laminse, without depressing the opaque body. Eig. 7 and 8.—Operation for depression. In Eig. 8, the first step of the operation is shown, viz., the passage of the needle through the sclerotic; its point has been carried behind the Iris, and is seen in the eentre of the pupillary aperture. In Eig. 7, the point of the instrument has been moved down¬ wards and backwards, carrying with it the opaque and dislodged lens. [Even making allowance for fore-shortening, the artist has represented the point of the needless entrance in both these figures considerably too close to the edge of the cornea. See pp. 20G and 208.]