Method and mold for fabricating contact lens and controlling excess material and method for fabricating the same mold

A contact lens mold comprising

• a first mold having a mold cavity, wherein a side wall is formed around a rim of said mold cavity, and wherein said side wall has a plurality of protuberances, and wherein a groove is annularly formed on said side wall and transversely passes said protuberances;
• and
• a second mold having a round protrusion matching said mold cavity of said first mold.

A method for fabricating a contact lens mold, comprising steps:

• fabricating a first mold and a second mold, wherein said first mold has a mold cavity and a side wall formed around a rim of said mold cavity, and wherein said side wall has a plurality of protuberances, and wherein said second mold has a round protrusion;
• and
• using a disc-shape cutter to cut said side wall and said protuberances of said first mold, wherein a support seat drives said first mold to rotate in a direction identical to a rotation direction of said disc-shape cutter and let said disc-shape cutter annularly cuts said side wall and said protuberances to form said groove.