| 摘要 |
An instrument for implanting an elastically foldable intraocular lens in an eye is described. The instrument comprises a barrel having proximal and distal ends and a nozzle having a slender ocular insertion end region sized for insertion through an ocular incision no greater than about 3.7 mm., the nozzle being attached to the distal end of the nozzle. The barrel includes an intraocular lens holding chamber upstream of the nozzle. First and second shield elements are disposed inside along opposite side regions of the nozzle, each of the shield elements having an elastically deformable protective shield region disposed in the nozzle in an elastically deformed state. A mechanism is described for enabling the sequential pushing of the protective shield regions axially out of the nozzle insertion end region for expanding into their undeformed shape, the pushing of an elastically deformed intraocular lens axially out of the nozzle insertion end region for expanding into its undeformed state between the protective shield regions, and the pulling of the protective shield regions back into the nozzle insertion end region. The protective shield regions are generally paddle-shaped having a thickness of about 0.15 mm in their undeformed state and at least one of the protective shield regions having a width of about 5 mm in an undeformed state.
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