| 摘要 |
A punctum plug (100) includes a proximal head (102), a distal body (106), and a thin walled flexible shaft (104) between the head (102) and the body (106). The thin wall of the shaft (104) of the plug (100) is preferably provided with accordion-like folds (114, 116, 118), thereby permitting the length of the shaft to vary depending upon the degree to which the accordion-like folds are folded or unfolded. In addition, the accordion-like folds permit the thin wall of the shaft to easily bend, permitting the head and body of the plug to lie along different axes. As a result, the plug is shaped to accommodate both relatively long and short vertical puncta, and the body of the plug may be angled relative to the head to accommodate a variety of anatomical structures. According to another aspect of the invention, the body of the plug may be provided with a thread which rotationally guides the plug into the small punctual opening.
|
