F12/Opt

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.

Min Thick at Crib Diam - this field is either blank, which means the job will use the system settings for MINTHKCD, or the lab can specify a specific value for this order only. This allows the lab to have a system-wide setting (say 0.3mm or 0.5mm), but for a specific job, set it to 0 (or a smaller value) to allow a job to be processed, perhaps with a knife edge, but is necessary in order to be able to process the job. The valid values for this field are blank, or a value between 0.0 and 4.0mm.