| 摘要 |
An improved method for generating a toric surface on a molding tool for forming contact lens molds comprises: (a) providing a tool which comprises an elongated body and a molding portion at one end of the tool, wherein the molding portion comprises a surface which is substantially spherical; (b) applying a force to the elongated body so as to distort the spherical surface of the molding portion; (c) machining a substantially spherical curve in the distorted surface while maintaining the applied force; and (d) releasing the applied force, wherein the spherically cut surface assumes a toric shape upon release of the applied force. |
