A synopsis of the diseases of the eye, and their treatment: to which are prefixed, a short anatomical description and a sketch of the physiology of that organ / By Benjamin Travers.

  • Travers, Benjamin, 1783-1858.
Date:
1824
Catalogue details

Licence: Public Domain Mark

Credit: A synopsis of the diseases of the eye, and their treatment: to which are prefixed, a short anatomical description and a sketch of the physiology of that organ / By Benjamin Travers. Source: Wellcome Collection.

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    long, varying in size, flattened atone end, and slightly bulbous at the point, are the instru- ments I use for the purpose of restoring the passage. ‘The probe is introduced with perfect facility by one. who is familiarly acquainted — with the anatomy of the part, from either of © the puncta lacrymalia into the corresponding nostril,; when: no obstruction is’ offered to its passage.. If the punctum be constricted, it is readily entered and dilated by a common pin; probes; the direction and relative situation of the lacrymal ducts, the sac, and the nasal canal, — point out the proper course of the instrument. It is confirmed by its advance without.the em- ployment of force, and the sensation conveyed by the free-and unencumbered motion of its point; until the point is fairly within the sac, it is necessary to keep the eyelid gently stretched and slightly everted; the upper lid being drawn a little upward toward the brow, the lower as much downward toward the zygoma. The point carried home to the sac and touching lightly its nasal side, the lids may be left at li- berty, while a half circular motion is per- formed by the instrument; the surgeon neither - suffering the point to recede, nor, on the other hand, allowing it to become entangled in the membrane. Hios! The probe now rests in a perpendicular di-