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  1. It seems everyone has confidence with the...

    It seems everyone has confidence with the engravings in free form lenses. These engravings are put on by the lab and there is huge opportunity to misplace those engravings. If your lab does not have...
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    It is almost impossible to repolish an eyeglass...

    It is almost impossible to repolish an eyeglass lens. If it is a plastic material it will have hard coat over the lens material which would prevent any attempt to repolish. You would need tooling to...
  3. I think he is trying to say that the dots are to...

    I think he is trying to say that the dots are to light. It seems typing errors are being spell checked to the wrong words.
  4. Try adding a little liquid soap to the ink...

    Try adding a little liquid soap to the ink mixture.
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    I think the Doc should recheck his findings. It...

    I think the Doc should recheck his findings. It does not seem possible for the prism to be that much different in the reading portion.
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    You should contact the prescriber to see what he...

    You should contact the prescriber to see what he or she had in mind. Slab off can be done in SV lenses but if the patient is able to alter the gaze point on the lenses slab off won’t be needed. If...
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    Bag systems work extremely well if you mate it...

    Bag systems work extremely well if you mate it with a spreadsheet. Just number the bags and keep all the information on a spreadsheet. Last name first name phone number order date how many times you...
  8. Thread: Crizal Rock

    by Lensman11
    Replies
    71
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    9,807

    It has been many years since alundum has become...

    It has been many years since alundum has become unavailable. It seems there is no desire to have a uniform standard to rate scratch resistance. This way each manufacturer can claim whatever they want...
  9. Thread: Crizal Rock

    by Lensman11
    Replies
    71
    Views
    9,807

    Do you know anything about this new test. The...

    Do you know anything about this new test. The abrasion agent (alundum) is no longer available for the Bayer test. Did they just introduce a new abrasion medium , if that is the case then the whole...
  10. Thread: Crizal Rock

    by Lensman11
    Replies
    71
    Views
    9,807

    Don’t get caught up in the hype. The sand test...

    Don’t get caught up in the hype. The sand test that measures scratch resistance shows it is no better than what is currently on the market. Remember 1+3=4 2+2=4 4+0=4 all that counts is the end...
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    Other than Poly you can tint before you spin coat...

    Other than Poly you can tint before you spin coat so the tintability of the coating doesn’t matter. When I was GM at Essilor Dallas we were spin coating with td2 the current dip coat material and...
  12. Thread: Crizal Rock

    by Lensman11
    Replies
    71
    Views
    9,807

    This appears to be another marketing driven...

    This appears to be another marketing driven product. There is nothing definitive about to warrant a higher cost. Six layers is the standard for high quality coating. Comparing to substrate match is...
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    You can add a tint to ar but it depends on the...

    You can add a tint to ar but it depends on the requirements of the ar. If you are spinning the hard coat no problem. Many sun lenses are pre colored material no problem, Polaroid no problem. If you...
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    They should have told you why. Most likely it is...

    They should have told you why. Most likely it is because when they hard coat the lens after tint some of the tint will leach out and spoil the dip coat.
  15. Thread: Clip ons!

    by Lensman11
    Replies
    21
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    1,843

    The magnet in the clip has to be several mm in...

    The magnet in the clip has to be several mm in the edge so to attach to the frame you would have to make the clip much larger than the frame. That would detract from the appearance in addition the...
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    There is no free form generator that can handle...

    There is no free form generator that can handle that amount of prism. Actually they have problems with more than 2 diop of prism. Usually you have to block in the prism and not ask the generator to...
  17. Thread: Clip ons!

    by Lensman11
    Replies
    21
    Views
    1,843

    The downside of using Chemistre clips on a...

    The downside of using Chemistre clips on a drilled rimless is you might have to make the lens thicker to accommodate the magnets. This is sometimes objectionable to the patient. They usually warn...
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    Where in the Zeiss literature do they make this...

    Where in the Zeiss literature do they make this claim. Prism thinning has been added to progressive lenses for decades. The purpose of prism thinning is to equalize the thickness on the top and...
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    Check the off center optics in the ft. Move the...

    Check the off center optics in the ft. Move the lens horizontally and vertically in the lensometer and observe if there is any dramatic change in power do to poor surfacing techniques.
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    A reverse slab cannot be made at the lab level,...

    A reverse slab cannot be made at the lab level, it has to be part of the mold when the lens is cast. The market for this product is small and in high index it is smaller yet. The economics are not...
  21. Thread: Crizal Rock

    by Lensman11
    Replies
    71
    Views
    9,807

    Manufacturers are always going to produce new...

    Manufacturers are always going to produce new products sometimes better sometimes not. The marketing department will always spin it to get new customers. IMO the only thing the customer wants in an...
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    I guess I qualify as a lab rat with 5 decades...

    I guess I qualify as a lab rat with 5 decades owning and running different labs. I both agree and disagree with Chris’s statement. I was GM for one of the largest labs in the US doing 3000 orders per...
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    Measurements can be made by placing a piece of...

    Measurements can be made by placing a piece of tape across the back of the frame and measuring from a closed eye lid to the tape. Then you add approximately 3mm for the thickness of the lid and add...
  24. Alex most people don’t know that the word...

    Alex
    most people don’t know that the word optician is not a contraction of optical and technician but optical and magician. I was told that by a frame designer. Just kidding it really comes from...
  25. Alex If you are referring to flat metal frames...

    Alex
    If you are referring to flat metal frames False front meaning the eyewire is mounted behind the front I have simple solution. Most edgers allow you to alter shapes after you trace them just...
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