A capsularhexis device comprises a resistive-heating element formed from an electrically resistive, superelastic wire formed into a loop. A bare surface of this loop is applied to the anterior capsule and electrically heated to define a rhexis boundary, such that a smooth circular or oval capsule portion may be removed. In some embodiments, the superelastic wire is formed to include a loop, so that first and second ends of the wire are adjacent to one another and extend away from the loop to form a lead section. An electrically insulating material may completely or partly surround the first and second ends of the wire so that the first and second ends of the superelastic wire are electrically separated. A handle engages at least a portion of the lead section so that the loop-shaped heating element may be moved in and out of the anterior chamber.一種囊袋切開裝置，其包含一由形成為迴圈之抗電超彈性金屬線所形成的抗加熱元件。此迴圈之一裸露表面係施加於前囊袋且電性加熱以界定一切開界限，致使一平滑圓形或卵圓形囊袋部份可被移除。於某些實施例中，超彈性電性係形成為包括一迴圈，使得該迴圈之第一及第二端係彼此鄰近且延伸遠離該迴圈以形成一先導區段。一電性絕緣材料可完全地或部份地圍繞該金屬線之第一及第二端，使得超彈性金屬線之第一及第二端係電性分離。一把手接合至少一部份之先導區段，使得迴圈形加熱元件可移入及移出前室。
