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【課題】 プランジャーと挿入部内壁との間に光学部の一部が潜り込むことによる光学部の破損やプランジャーの乗り上げを抑制できる眼内レンズ挿入器具を提供する。【解決手段】 眼内レンズ挿入器具は、眼内レンズを折り畳むために先端に向かうに従い眼内レンズが通過する空間が狭くなる通路を有する挿入筒部と、挿入筒部の基端に眼内レンズを載置するレンズ保持部と、挿入筒部から眼内レンズを押し出すために挿入器具本体の筒内で軸方向に進退移動可能に設けられたプランジャーとを有し、プランジャーの先端部は,その外周領域の一部に挿入筒部の内壁に沿うように形成される外周形状を有し,外周形状の所定領域に眼内レンズとの接触において所定の摩擦力を発生させることで先端部と挿入部内壁との間に眼内レンズの一部が潜り込むことを抑制するための凹凸が形成されている。【選択図】 図6
