Results 1 to 5 of 5

Thread: Slab-Off Pal

  1. #1
    OptiBoard Professional
    Join Date
    Jan 2017
    Location
    USA
    Occupation
    Dispensing Optician
    Posts
    127

    Slab-Off Pal

    Anyone here ever dispense a Slab-off PAL? Our lab says it can be done on non-digital progressives, I've only done a handful of FT28 w/slab off so I'm not sure what a good traditional progressive designs would be for this patient...patient is in a zeiss choice progressive currently.

    RX is
    -1.75 -0.75 x112
    +3.00 -4.50 x090
    +2.50

  2. #2
    OptiWizard
    Join Date
    Feb 2010
    Location
    ALBUQUERQUE
    Occupation
    Optical Wholesale Lab (other positions)
    Posts
    363
    I have but critical measure will be reading depth. Typically for FT 28 10mm is used. Determine reading gaze based on PRP. For the few I did, 12 to 14 mm was used.

  3. #3
    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
    Join Date
    Dec 2004
    Location
    At a position without dimension...
    Occupation
    Dispensing Optician
    Posts
    4,566
    With a +2.50 add if this is a FT conversion to a first time progressive.....

    JUST DON"T DO IT!

    If you must- charge big, big bucks (I'd be in the $1,000 range) and put them in the best Zeiss (if that's what you deal with) available to compensate for the high cyl's axis shift necessary for the downgaze, and with a short corridor. Even then forewarn them that the intermediate may still not work.

    I'll defer to others with more experience if they have another suggestion but I would do everything I could to talk them out of this tar-baby you are about to embrace.

    But then again- who knows if Ryser's Rule will work!

    Be sure to have them sign a waiver that there will be no refund if/when it fails.
    Last edited by Uncle Fester; 09-22-2020 at 09:43 AM.

  4. #4
    OptiBoard Professional
    Join Date
    Jan 2017
    Location
    USA
    Occupation
    Dispensing Optician
    Posts
    127
    This patient is a seasoned progressive wearer but I'm going to try to talk her out of it, since it sort of defeats the purpose and aesthetics of a progressive lens. We shall see. Thanks everyone for your advice.

  5. #5
    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
    Join Date
    Dec 2004
    Location
    At a position without dimension...
    Occupation
    Dispensing Optician
    Posts
    4,566
    You might want to hold a trial base up prism to the right(?) eye of an existing pair of progressives- or get a Fresnel for them to trial.

    They may be using them monocularly and the slab prism will open a can-o-worms.

    Why are you fixing what isn't broken? Or is this request coming from the patient?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. slab off
    By slackware in forum Ophthalmic Optics
    Replies: 10
    Last Post: 11-23-2007, 01:39 PM
  2. Slab off...
    By TLG in forum General Optics and Eyecare Discussion Forum
    Replies: 25
    Last Post: 06-05-2007, 10:56 AM
  3. Slab off Vrs. Reverse slab off: when,why?
    By Alteaon in forum Ophthalmic Optics
    Replies: 11
    Last Post: 02-21-2007, 04:38 PM
  4. slab off goo
    By offaxis in forum General Optics and Eyecare Discussion Forum
    Replies: 1
    Last Post: 11-28-2005, 05:42 PM
  5. Slab Off and Slab On????
    By mizzrai in forum General Optics and Eyecare Discussion Forum
    Replies: 3
    Last Post: 10-06-2005, 06:39 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OptiBoard is proudly sponsored by:
Younger Optics and Vision Equipment