Superelastic nitinol ring for cataract capsulotomy

A capsulotomy device, comprising:

• a suction cup;
• and
• a super elastic nitinol ring coupled to the suction cup and configured to, upon receiving current flow from the capsulotomy device, produce heat sufficient to cut tissue in contact with the nitinol ring, wherein the nitinol ring is manufactured by:
• permanently flattening edges on a first side and a second side opposite the first side of a nitinol wire of at least a threshold width, wherein the nitinol wire has a circular cross section, and wherein the flattened edges on the first side and the second side are formed by compressing the nitinol wire on the first side of the nitinol wire and the second side of the nitinol wire;
• flattening edges on a third side and a fourth side opposite the third side of the nitinol wire of at least a threshold height, wherein the flattened edges on the third side and the fourth side are formed by cutting off a portion of the nitinol wire on the third side of the nitinol wire and the fourth side of the nitinol wire, producing a modified nitinol wire with a rectangular cross section;
• and
• producing the nitinol ring by bending the modified nitinol wire such that a first end of the modified nitinol wire aligns with a second end of the modified nitinol wire and permanently coupling the first end to the second end of the modified nitinol wire.