A quick change conveyor roll assembly for metal or glass processing comprising an inner roll shaft having a rigid and elongated cylindrical surface supported and rotationally driven by an associate rotor mean. The eye produces a biological response to trauma, such as a LASIK keratectomy or other necessary traumatic procedure in preparation for refractive surgery. Writing and reading of either volatile or nonvolatile data can occur. The carrier boxes are thrown with loads at the transfer portion, and are delivered by the chain conveyer and discharges the loads at a predetermined location according to the loads.