| 摘要 |
A punctum plug (100) includes a proximal head (102), a distal body (106), a shaft (104) between the head (102), and the body (106). The shaft (104) of t he plug (100) is provided with one or more foldable portions, thereby permittin g the length of the shaft to vary depending upon the degree to which the folds are folded or unfolded. In addition, the folds permit the 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 an d short vertical puncta. The body of the plug may be angled relative to the he ad to accommodate a variety of anatomical structures.
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