Remove the anti reflection coating?

Discussion in 'Optometry Archives' started by SimonLW, Jan 25, 2006.

  1. SimonLW

    SimonLW Guest

    I have a strong prescription with the greenish reflecting coating. I guess
    it is either Ziess or Hoya that is applied to the plastic lens. For some
    reason, after time, I get very fine scratches on the back curved side of the
    lens near the center. I'm getting new glasses anyway so I wonder if there is
    a chemical available I could strip off the damaged coating without affecting
    the rest of a lens. I'd consider this an experiment so I won't be too upset
    if I damage the lens.

    SimonLW, Jan 25, 2006
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  2. SimonLW

    gudrun17 Guest

    My optician offered to scrape off the anti-reflective coating from my
    last pair of glasses so I know it can be done, but I don't know how. I
    decided to leave it alone although it annoys me. Are you sure the
    scratch is just in the coating, though?
    gudrun17, Jan 25, 2006
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  3. I know it can be done, but I don't know how.

    I asked my opt. about that once - he said that it is a coating that is
    bonded to the lens at a molecular level at the time
    the lens is created. It can't be removed, can't be replaced (without
    wrecking the lens).

    For me, putting the words 'scrape' and 'lens' in the same sentence is
    just begging for trouble.
    The Central Scrutinizer, Jan 25, 2006
  4. SimonLW

    Salmon Egg Guest

    Don't count on the opt., whatever opt. stands for, for knowing much about
    coatings. He/she is probably just passing on marketing hype.
    -- Ferme le Bush
    Salmon Egg, Jan 25, 2006
  5. SimonLW

    Mark A Guest

    The less expensive kinds of AR coatings can be removed (and are not worth
    buying). The AR coatings that sold by the name brand manufacturers (Crizal,
    Zeiss, Seiko, etc) usually cannot be removed.
    Mark A, Jan 25, 2006
  6. I agree, by less expensive kinds of AR it is possible to remove. But
    the newer (much better and expensive) kinds like Zeiss Lotutec etc.
    would ruin the structure of the optical surface.
    Christopher Zoettl, Jan 26, 2006
  7. SimonLW

    SimonLW Guest

    Okay, thanks for the feedback. It looks like I should leave the coatings
    alone. For now, I spray a little furniture polish on a cloth and wipe over
    the area lightly to leave a film of silicone oil. It fills in the fine
    scratches and makes the lenses nearly clear again.
    SimonLW, Jan 26, 2006
  8. SimonLW

    Salmon Egg Guest

    I went for the Crizal. I was amazed about how well the glasses and the
    coating stood up. Nevertheless, at about 18 month the coating went to pot in
    a way that reminds me of the One Horse Open Shay.

    After searching in vain to find a supplier of hot magnesium fluoride
    antireflection coatings, I gave up. I am now using uncoated lenses.


    -- Ferme le Bush
    Salmon Egg, Jan 26, 2006
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