These screens contain the optional information that modify the way a lens is manufactured. This optional screen has several tabs to chose from that contain information used for the order.
General Tab
SEGDHT - these fields contain the length in millimeters from the top of the segment or fitting cross (if progressive type lens) or the vertical decentration point of a single vision lens, to the point where a vertical line would cross the frame. Entries in these fields are used to calculated the SEGHT or the vertical decentration of the prescription. The fields are only accessible if the order has a valid pattern, with trace points.
