Computer-controlled milling machine for producing lenses for clip-on accessory

A method for shaping a blank to create a lens using a machine and a computer, the machine being adapted for the shaping and having a worktable adapted to support the blank during the shaping, the computer being adapted for coordination of operation of the machine, the method comprising the steps of:

• (a) providing an outline in accordance with which the blank is to be cut;
• (b) providing at least one non-zero horizontal or vertical offset of the lens;
• (c) positioning the blank on the worktable;
• and
• (d) cutting the blank along a perimeter of the lens which is in accordance with the outline;
• wherein the location of the perimeter within the blank is shifted in accordance with the at least one offset.

A machine for shaping blanks to create a lens;

• said machine comprising:
• (a) a pair of worktables each to support one of the blanks to be shaped, and each to be driven by a first motor;
• (b) a drill bit unit provided with a rotatable drill bit;
• (c) an elevator supporting said drill bit unit and shiftable along a vertical axis to raise or lower the drill bit with respect to the blank on each worktable, and a second motor for driving the elevator;
• (d) a carriage carrying said elevator and shiftable along a horizontal axis to move the drill bit back and forth with respect to said blanks, said carriage being driven by a third motor;
• and
• (e) a processor including a digitally stored database in which is stored digital data regarding the predetermined geometry of the frame of the eyeglasses, from which data to the processor coordinates the operation of the first, second and third motors to cause said drill bit to shape the blanks to form the lenses of a desired geometry.