Note: If your edger is set to “AUTO” and has no reason to run a job on “MANUAL” then you would simply block a progressive lens directly on its fitting cross with the painted reference lines horizontal to the blocker grid.

Just as with lined multi-focals progressives require shift in both the horizontal and vertical. Progressives ALWAYS use monocular PDs where lined multi-focals (almost) ALWAYS use binocular PDs.

Prism in progressive lenses is ground in at the lab. So, if the lab did the job correctly and you do the layout work correctly the prism amount will be correct.

Progressives layout work is done from the fitting cross.

Image-13.34

Example for a right Lens:

Frame A = 53

DBL= 19

Frame B = 30

Patient PD = 33/32

Fitting Height = 18

Frame PD 72/2 = 36

36 – 33 = 3 IN

Frame B/ 2 = 15

15 – 18 = -3 or 3 UP

Image-13.35
PD difference means I would shift my lens 3mm Right for IN

Height of 18 means I would need to move my lens UP 3mm.

Think 3 In 3 Up

progblock3and3close
Here that is in a close up. Note that the actual fitting cross has moved over 3mm and up 3mm. Note that all the progressive markings are still aligned correctly with the grid.

Once I have the lenses in this position I would load the blocker with a block (with a sticky “leap pad” attached) and stick the block to the front of the lens.

Example for a Left Lens:

Frame A = 53

DBL= 19

Frame B = 30

Patient PD = 33/32

Fitting Height = 19

Frame PD 72/2 = 36

36 – 32 = 4 IN

Frame B/ 2 = 15

15 – 19 = -4 or 4 UP

Image-13.36
PD difference means I would shift my lens 4mm Left for IN.

Height of 19 means I would need to move my lens UP 4mm.

Think 4 In 4 Up

progblockcloseup4and4
Here that is in close up. Notice that the fitting cross has actually been moved 4mm Over and 4mm Up.