| 摘要 |
The invention provides a thin-walled, hubbed cannula (14) for use as an adapter (10) suitable for placement in an incision of the sclera, having having an outer diameter that is approximately the same as a 20 gauge surgical instrument and an inner diameter defining a bore (16) that is slightly larger than a 23 gauge surgical instrument. The scleral contact surface (20) of the hub (12) of the adapter also can be rounded to provide a pivot point for a surgical instrument shaft inserted in the bore (16), thereby reducing bending forces on the relatively thin shaft of the instrument.
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