b'PROGRESSIVE LENS MARKINGIMPACTRX PAL and SINGLE VISION LENS MARKINGPROGRESSIVE 15 mm.Distance reference pointPrism reference pointNear reference point Minimum Fitting Height 15 mm9 15 1520 20FF-ASFitting Point OS (L) OD (R)proprietary invisible marksInk Marking: BluInvisible Marking: red FF-ASPROGRESSIVE 18 mm.Distance reference pointPrism reference pointNear reference point Minimum Fitting Height 18 mm18 18Fitting Point OS (L) OD (R)proprietary invisible marksInk Marking: BluInvisible Marking: red FF-AS83'