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  1. Thread: Axis query.

    by Lensman11
    Replies
    23
    Views
    1,009

    Actually being able to surface to a tolerance of...

    Actually being able to surface to a tolerance of 1/100 is important. It is the only variable the lab can control. If all the tolerances on an order move in the wrong direction you can have a problem...
  2. Thread: Glass Lenses

    by Lensman11
    Replies
    8
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    2,101

    Have it made in clear glass and vacuum coat it...

    Have it made in clear glass and vacuum coat it green.
  3. Replies
    12
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    607

    -2.00 with a plus + 3.00 add needs thinning. One...

    -2.00 with a plus + 3.00 add needs thinning. One eye plus one eye minus needs thinning.
  4. Replies
    12
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    607

    Some labs prism thinning minus lenses as it will...

    Some labs prism thinning minus lenses as it will make the edges equal thickness. This particular Rx is actually slightly plus in the reading power in the 90 meridian so it would benefit from prism...
  5. Replies
    12
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    607

    If you checked for prism imbalance at the prp...

    If you checked for prism imbalance at the prp their should be no imbalance. If you checked at the reading level you will get about 3/4 diop imbalance. If their old pair was the same Rx they would...
  6. Replies
    12
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    607

    Please post the RX this would help in...

    Please post the RX this would help in understanding the problem. At what point on the lens are you checking for prism.
  7. Replies
    5
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    667

    Apply it over a blue blocker lens material or...

    Apply it over a blue blocker lens material or tint the lens to block blue.
  8. Replies
    5
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    667

    There is already an anti microbial anti virus AR...

    There is already an anti microbial anti virus AR coating on the market it has not been an overnight success.
  9. Replies
    6
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    703

    If your lab is able to do a slab off they can...

    If your lab is able to do a slab off they can take a single vision blank create the amount of prism you want. The prism can be oriented in up or down only if you turn it in or out the line would...
  10. Replies
    49
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    3,939

    Harvard study states some interesting facts....

    Harvard study states some interesting facts. “Blue light has a dark side” a synopsis is available on line.
  11. Replies
    10
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    5,573

    You are mixing apples and oranges. Prism thinning...

    You are mixing apples and oranges. Prism thinning has nothing to do with prentice’s rule. The goal is to make the thickness on the top and bottom of the lens equal so the overall lens can be thinner....
  12. Replies
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    5,573

    The 2.37 @ 270 seems to indicate the prism...

    The 2.37 @ 270 seems to indicate the prism thinning. This value is usually not part of the Rx as the value should change based on the frame selection, lens design and fitting height. In addition...
  13. Replies
    2
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    491

    Never heard of a tinted hard coat it is probably...

    Never heard of a tinted hard coat it is probably possible but you would need a dedicated machine as the tinted coating would be difficult remove from the coater. Why not get pre colored poly or use a...
  14. Replies
    1
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    547

    If they did not discontinue the blue use that for...

    If they did not discontinue the blue use that for the ir and add some color to make it gray.
    I would ask BPI if that have an answer to your dilemma.They might make a batch if you prepay.
  15. Try contacting WmMcdonald who posts on this board...

    Try contacting WmMcdonald who posts on this board he is knowledgeable in this area.
  16. I would suggest you contact the NewYork state...

    I would suggest you contact the NewYork state society of dispensing opticians Albany NY. You can contact them online.
  17. Replies
    12
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    1,954

    There is a face wrap and panto calculator as part...

    There is a face wrap and panto calculator as part of the opticampus section on this web site. Put in your numbers you should get a reasonably close answer to your question. Vertex distance is not...
  18. Unless things have changed since I obtained a NY...

    Unless things have changed since I obtained a NY license there were two routes to get a license. First you could attend one the accredited Ophthalmic technical schools or serve an apprenticeship...
  19. Replies
    9
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    881

    Uncle Fester You got the name and the spelling...

    Uncle Fester
    You got the name and the spelling correct and there was the Dual matic and the LeMay made by Santinelli in the USA as well as a machine made by Shuron the model I have forgotten as I...
  20. Replies
    9
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    881

    You can obtain the same level of transparency on...

    You can obtain the same level of transparency on the edge as on the front and back surface. You will have to use cerium to accomplish it. The patients often times complain of severe reflections off...
  21. Replies
    9
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    881

    It is absolutely possible I have done hundreds of...

    It is absolutely possible I have done hundreds of times. You will need a paste made of cerium oxide or a rouge that works on glass. The polish has to be applied to a felt pad that is mounted on a...
  22. Replies
    6
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    1,025

    It is always a good idea to ask a difficult...

    It is always a good idea to ask a difficult question that they won’t know the answer to just to see how creative they can be. Patients do ask those kind questions. When I hired people to work in the...
  23. Replies
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    1,927

    The data is the data 3 mm below the middle of the...

    The data is the data 3 mm below the middle of the frame.
  24. Replies
    24
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    1,927

    If it is a normal style frame 3 below center will...

    If it is a normal style frame 3 below center will work the majority of the time. This number was gathered many years ago when we were trying to automate marking of lenses and tracked the bifocal...
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    701

    I neglected to say that with a laser you are...

    I neglected to say that with a laser you are welding not soldering.
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