Visslo F8 premier Operation Manual page 15

25. PD (Pupillary distance)
(30.00mm~99.50mm by the steps of 0.5mm)
26. SIZE (Size compensation value)
Indicates the compensation value for the complete lens size required from
diameter,which is originated from traced size of the frames or patterns(0.00)
27. Layout mode
: (Optical center)
: (Frame center)
Indicate horizontal and vertical distance between optical center and
frame center
: Bi-focal lens mode
27. Memory address(MEM)
Store or read the traced pattern data while use memory function and may be able
to store up to 120 addresses.
V(Vertical)
H(Horizontal)
MIN : 70.00