The delivery of the lens for the extraction of cataract : irrigation of the anterior chamber and the first toilet of the wound / L. Webster Fox.

  • Fox, Lawrance Webster, 1853-1931.
Date:
[1907]
Catalogue details

Licence: In copyright

Credit: The delivery of the lens for the extraction of cataract : irrigation of the anterior chamber and the first toilet of the wound / L. Webster Fox. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    18) lias devised a right- and left-hand cystitome adapted for each eye, but at convenient angles to be inserted in the anterior chamber. Ziegler (Fig. 4, 19) has devised a lance-shaped .cystitome which I have found extremely useful in making a large cut in a thickened capsule. The flexible cystitome of to-day (Fig. 3, 7) with its small-cutting lance-shaped blade was used by each and every surgeon at Moorfields in London during my term of service there, and it is probably used by more ophthal- mic surgeons than is any other form. Be Wecker (Fig. 5, 1), Foster (Fig. 5, 2), Collins (Fig. 5, 3), Liebreich Kig. 0.—Demonstrating the forces which expel the crystalline tens : 1. l’rimnl pressure with spatula on cornea. 2. Currents re- turning, tilting lens. 3. Exit of crystalline lens through corneal In- cision. (Fig. 5, 4) have substituted capsular forceps specially devised for grasping and extracting as much of the an- terior capsule as possible. This method of opening the capsule requires great delicacy of touch and immobility of the eye. It is not my province nor wish to speak about the merits and demerits of each and every one of the many cystitomes made; I have only mentioned a few which 1 have found the most mechanically perfect and best adapted to lacerating the cgpsule. After the capsule has been opened by any one of the instruments described, cystitomes or forceps, the next stage is the delivery of the lens. Pressure on the lower half of the cornea and gentle pressure against the upper lip of the incision causes the eye currents to move back- ward in the lower half of the eye and forward in the upper half of the globe in direct ratio to this pressure and counter-pressure. The lens (Fig. 6) is thus made to tilt forward on its equatorial axis and by continued gentle pressure below it is forced forward and upward with the currents finding their way through the incision,
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