PROBLEM TO BE SOLVED: To achieve a minimally invasive surgery, improve operability and reduce a burden on a surgeon by reinforcing the rigidity of an insertion section to be stuck into an eyeball in vitreous surgery or the like and by reducing a diameter of a section to be inserted into the interior of the eye.SOLUTION: This ophthalmic surgical instrument is provided with a tubular insertion member, a core member that is fitted in the insertion member so as to slidingly move in its axial direction, and a working section having a working tool at an opening/closing type spring member that is provided at the distal end of the core member and openingly/closingly driven by slidingly moving the core member inside the insertion member, wherein the insertion member has a working section storage for storing at least a part of the working section and a core slide section for slidingly moving the core member, at its distal end, and at least a part of the inside diameter of the working section storage is formed larger than the inside diameter of the core slide section.COPYRIGHT: (C)2010,JPO&INPIT【課題】 硝子体手術の際等に眼球内に刺し込まれる挿入部材の剛性を補強し、眼内に挿入される部分の細径化によって低侵襲手術を可能にするとともに、操作性の向上や術者の負担軽減を可能にする。【解決手段】 管状の挿入部材と、この挿入部材にその軸方向にスライド移動可能に嵌入されている芯部材と、この芯部材の先端部に設けられて前記芯部材を挿入部材内でスライド移動することにより開閉駆動される開閉式のばね部材に作業ツールが設けられた作業部とを有する眼科用手術器具であって、前記挿入部材は、その先端部に前記作業部の少なくとも一部を収納する作業部収納部と前記芯部材をスライド移動させる芯スライド部とを備えており、前記作業部収納部の少なくとも一部の内径を前記芯スライド部の内径よりも大きくしたことを特徴とする。【選択図】 図1
