| 摘要 |
PROBLEM TO BE SOLVED: To provide an intraocular lens injection instrument capable of restraining breakage of an optical part and getting-on of a plunger caused by getting in of a part of the optical part between the plunger and the inner wall of the injection portion. SOLUTION: The intraocular lens injection instrument includes: an injection tubular part having a path wherein the space that an intraocular lens passes through gradually smaller toward the front end for folding the intraocular lens (IOL); a lens holding part for mounting the IOL on the proximal end of the injection tubular part; and a plunger provided so as to be moved forward and backward in an axial direction inside the tube of an injection instrument body for pushing the IOL out of the injection tubular part. The tip portion of the plunger has an outer peripheral shape formed so as to be along an inner wall of the injection tubular part at a part of the outer peripheral region, and asperities for suppressing the entry of part of the intraocular lens between the front end and the injection part inner wall by generating predetermined frictional force by contact with the IOL are formed in the predetermined region of the outer peripheral shape. COPYRIGHT: (C)2011,JPO&INPIT
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