| 摘要 |
A superelastic or shape-memory iris retractor for use in operating on the eye of a living creature, by means of which the iris is drawn outwards for widening the pupil. The iris retractor essentially comprises a superelastic or shape-memory grasping element and a preferably retainer which suitably is displaceable relative to the grasping element. In use, the grasping element is inserted suitably through a scleral, limbal or other incision and engages the iris for mechanically dilating the pupil. When removed, the grasping element can straighten so as not to catch on the scleral incision. In the shape-memory embodiment, the grasping element will revert to the element's original shape condition upon heat treatment. Both embodiments can withstand autoclaving for multiple reuses.
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