Edging Progressives

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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 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.

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

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