[Transactions of the American Ophthalmological Society] ; Transactions of the American Otological Society : second annual meeting, Newport, R.I., July, 1869.
- American Ophthalmological Society
- Date:
- [1869]
Licence: Public Domain Mark
Credit: [Transactions of the American Ophthalmological Society] ; Transactions of the American Otological Society : second annual meeting, Newport, R.I., July, 1869. 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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![•. / / as experience lias shown that less dilatation is necessary than with the silver styles, and that medication of the sac by in- jections may, in inost cases, be disjicnsed with. The difference in the effect ])roduced by wearing tbetlcxiblc leaden styles, as compared with the rigid instruments of Dr. Williams, is imjiortant. Dy the use of the silver styles the lachrymal jiassagcs must, in many eases, be not only dilated, but also changed somewhat in direction to conform to the shape of the style ; with the leaden instrument, on the other hand, it is simjily dilated. This difference is well illustrated by the fact that the leaden jirobes always adajit themselves to any irregularities in the direction and curve of the nasal duct, and exhibit, after they arc withdrawn, a very considerable curvature, varying in different cases, but uniform in the succes- sive stages of the treatment of the same case. The only drawback to the usefulness of this j)lan of treat- ment has been the difliculty of mani})ulating the very flexible lead wire, es})ccially the smaller sizes. This is now remedied by making the styles tubular, and inserting a stylet of tempered steel wire. The stylet is withdrawn as soon as the style is ])laced in position, and the projecting top of the latter is bent over so as not to interfere with the movements of the eyelids. In this way the styles arc readily introduced even to the floor of the nostril, and yet can be worn with, in most cases, only a very slight degree of discomfort. The styles which I now use are of seven sizes, extending from seven-eighths of a millimetre to two millimetres in diameter, and numbering from twenty to fourteen of the com-](https://iiif.wellcomecollection.org/image/b22449784_0022.jp2/full/800%2C/0/default.jpg)
