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Thread: Progressive Slab-off

  1. #1
    Underemployed Genius Jacqui's Avatar
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    Confused Progressive Slab-off

    HELP !!! Is it possible to slab-off a progressive lens?? Customer just called me (at 6:30 AM) and needs to know if it is possible. I need HELP from those of you who have experience with these things.

  2. #2
    Banned
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    Yep, it's possible.

  3. #3
    Bad address email on file Bicentric Grinder's Avatar
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    Yes. No problem. Actually, most labs have ground at least a few. They are not as common as flat top slabs. Anyway, your lab should be able to do this nicely for you.

  4. #4
    Master OptiBoarder Darryl Meister's Avatar
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    You should consider an AR coating, since it will make the slab line less obvious (which is particularly important for "no-line" bifocals).

    Best regards,
    Darryl

  5. #5
    Master OptiBoarder JennyP's Avatar
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    We have sold a few slab-off progressives in the last few years, and even with AR coating, I was disappointed in how they looked. A flat top hides the slab-off better, but as a progressive wearer, I guess I would still try to stay in a progressive, and put up with the cosmetics, if I had enough visual change or a surgery warranted a slab-off for me.
    "The Good Lord gave us mountains so we could learn how to climb". ~ Lonestar

  6. #6
    Master OptiBoarder Texas Ranger's Avatar
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    Should be no problem, we have fit quite a few over the past few years too. just be sure not to fit them too low...

  7. #7
    since 1964 Homer's Avatar
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    Yup!

    All advice above is good!

    What a Country!!!!

  8. #8
    Underemployed Genius Jacqui's Avatar
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    Just got the slab-off back from the surface lab and I have to agree with Jenny P., it looks horrendous. Next time I'll try to talk the Dr's into using a flat top.

  9. #9
    Optician Extraordinaire
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    My sister in law wears a slab off and a progressive lens. She wears the Panamic with Crizal ar. Her one lens is a +3.25 and the other is a -.75. The lenses look fine(well as fine as lenses with that much difference can look). The line is very faint.

    She has had no problems at all with them.

  10. #10
    OptiBoard Professional William Walker's Avatar
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    We recently made a pair for a patient in a Gradal Top with Zeiss AR. The slab line was very apparent when holding the glasses out, but when anyone put them on, and an observer was looking for the slab line, it couldn't be seen, unless you got 2 feet away from the patient (slight exaggeration, but you get the point).

    The only problem I had was the patient wouldn't use them. We ended up nonadapting her into the same progressive without a slab.

    Oh well, we tried.
    William Walker

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    Optician with Lenscrafters in Jacksonville, FL

  11. #11
    Rising Star
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    Slabbing a progressive is not that uncommon, the slab should be placed at or just below the prism dot on your PAL, I have seen some pretty ugly ones from some labs but the ones I make have a line less than 1mm thick and I do a scratch coat on the back of all of them which smoothes the line down quite a bit and helps protect the lens as well.

  12. #12
    Master OptiBoarder OptiBoard Silver Supporter rdcoach5's Avatar
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    9 year old thread !

  13. #13
    OptiBoard Professional
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    Have produced a lot of PAL Slaboffs. Generally Slab Line was placed 2mm below PRP, for one custmer always 4mm below.
    Work fine, never complains. But i have only accepted orders above 2 prism difference, the slab line is to hard to control if you go below.
    Oh really 9 years old thread ;-)

  14. #14
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    I would not slab a progressive. Really? Where you gonna chose to match the prism? There are millions of people reading with one eye with no problem. Once they get the other eye done it will all work out. Try it with out first. Then if you have a problem, you can always add the slab. Refit!

  15. #15
    OptiBoard Professional
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    We have been producing freeform slabs where the line is blended, carefully, not a 5mm blur as some have said. patient acceptance is extremely good.
    If you have integrity, nothing else matters. If you don't have integrity, nothing else matters
    Laramy-K Optical

  16. #16
    OptiBoard Apprentice
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    didn't see the thread age. I'll bet the problem is solved by now!

  17. #17
    Master OptiBoarder OptiBoard Silver Supporter
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    IMHO this progressive slab-off thread may be 10-years old but it will still be relevant 10-years from now. There is a specialty lab in Florida called 'Slabs Plus' who have been doing
    just this for the past 25+ years. Just make sure you draw a picture for the client and explain the benefits of slab-off. Better yet, get a demo progressive slab-off lens made up for your office so you can hold it up against client's face.

  18. #18
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    There is also now "Slab On", and digital Slab-off that can be a huge help.

  19. #19
    OptiBoard Professional Robert Wagner's Avatar
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    Quote Originally Posted by sharpstick777 View Post
    There is also now "Slab On", and digital Slab-off that can be a huge help.
    I must be missing a lot here, will you explain please what is a "Slab On" is.
    Please and thank you.

    Robert
    There are many things in life that catch your eye... but very few things will catch your heart.... Pursue those!

  20. #20
    Master OptiBoarder OptiBoard Silver Supporter rdcoach5's Avatar
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    Quote Originally Posted by sharpstick777 View Post
    There is also now "Slab On", and digital Slab-off that can be a huge help.
    Do you mean reverse slab ?

  21. #21
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    Quote Originally Posted by rdcoach5 View Post
    Do you mean reverse slab ?
    Quest Lab calls their reverse slab, "Slab On"... it offers some options slab-off doesn't. They are on here, they could explain better than me.

  22. #22
    Master OptiBoarder OptiBoard Silver Supporter Java99's Avatar
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    Bumping thread because I just found it useful for the lab info, even thought this was started 11 years ago.

  23. #23
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    Slabing a progressive is a waste if money. Progressive corridors are long and a slab can only match the prism in one place.

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