PCMCIA slots are provided to a printer. The method involves replacing the lens by a polymerizable material injected into the emptied lens capsule and thereby providing a new lens implant with a predetermined refractive value, while admitting the possibility of controlling and adjusting the refractive value of the eye during the surgical process. Furthermore, each of the support and the main roller is configured so as to be separately replaceable with a new one. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary.