A professional who operates jeweler's lathe to cut inside or outside curvature in contact lens blanks. Responsibilities include:

• Reads prescription to determine lens thickness and dioptric power and converts specified dioptric power to radius dimensions, using conversion table.
• Inserts plastic blank in holding chuck of lathe.
• Adjusts cutting tool mechanism for specified radius of inside or outside curvature and depth of cut.
• Starts lathe and turns crank to advance cutting tool.
• Observes gauge and readjusts lathe to prevent excessive cutting.
• Pulls control arm to move cutting tool across face of lens.
• Removes lens from chuck and examines lens for smoothness of cut.
• Measures lens to verify compliance with specifications, using thickness gauge and calipers.
• Tapes finished lens to work order and places lens in routing box.