A method is disclosed for electronically processing constraints rules defined in a previously developed first PCB design having a first constraints output file, to facilitate the development of a second PCB design having a second constraints output file. A control panel with a mirror thereon is supported at one end of the support structure, and a touch screen data entrydisplay device is supported by the panel. The system includes a segmentation circuit for segmenting each frame of incoming video programs into a plurality of segments, and a motion detection circuit for detecting the slow moving object between successive frames and for determining the gravity level corresponding to the slow moving object. The circulator comprises a beam-splitting and -combining element for separating and combining mutually orthogonal polarizations and a non-reciprocal polarization rotator. More particularly, the present invention relates to processes and apparatus for ablating epithelial cells in the germinative zone or the pregerminative zone of the crystalline lens of the eye so that onset or progression of presbyopia or one or more symptoms is delayed or prevented.