History of iridotomy : knife-needle vs. scissors - description of author's v-shaped method / by S. Lewis Ziegler.

  • Ziegler, S. Lewis (Samuel Lewis), 1861-1926.
Date:
1908
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Credit: History of iridotomy : knife-needle vs. scissors - description of author's v-shaped method / by S. Lewis Ziegler. 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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    shaped knife, having a sharp edge on one side, a rounded back, and an acute point. We possess two good illustra- tions of this knife-needle, one by Cheselden himself (Fig. 3), and the other by his pupil, Sharpe* (Pig. 4). Por more than a century the method of Cheselden seems to have been the storm center of controversy. Some doubted his veracity, others essayed his operation but failed. while a few had a moderate degree of success. Fig. 1.—Original case of iridotomy. Iris incised above (Cheselden). Fig. 2.—Second case of irid- otomy. Iris incised below (Cheselden). Many attributed to him statements which do not appear in his published report. He says clearly that in each of his cases couching had previously been performed, and yet some have insisted that the lens was present, and must have been wounded. He also states that his inci- Fion was made from behind forward, and yet his fol- lowers, Sharpe* and Adams,both describe the incision as being made from before backward. As Sharpe was Fig. 3.—Original Icuife-ueedle in situ, behind the iris (Cheselden). his pupil, and presumably had seen him operate, Guth- rie suggests the possibility of his having made his in- cision both ways, the technic being practically the same. 4 Sharpe Samuel: A Treatise on the Operations of Surgery London, 1730, p. 100. ouigeij, A.;/fl ^'?'\?'-„^'' • r'ractical Observations on Ectropium Artificial Pupil and Cataract. London, 1SJ2, p 37 et soq ^ ' p. 428.^*^''' ^' ^' '' ^'■eei'y °f Eye, London, 1830,