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  1. I think you over thinking this issue. When you...

    I think you over thinking this issue. When you fit a s.v. Lens you put the oc in the geometric center but normal gaze is usually above geometric center. This is rarely a problem. The same holds true...
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    The progressive with an ultex seg on the top was...

    The progressive with an ultex seg on the top was originally. Called the pilot as it was intended to allow the pilot to see the gauges above his head The add on the top was 3/4 of the bottom add....
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    Check if the lens is warped. Use a lens clock and...

    Check if the lens is warped. Use a lens clock and check at 90 and 180. The true base curve will be at 90, compare that with the other glasses the patient is wearing.
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    It is possible that one or both of the lenses are...

    It is possible that one or both of the lenses are off polarization. It is common error at the lab being they are spheres the mark up person could easily forget to watch the polarization axis. You...
  5. Thread: Slab-Off Pal

    by Lensman11
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    717

    It can be done on any digital progressive, the...

    It can be done on any digital progressive, the lab just has to put the slab on the front. Younger makes cast slab blanks which could also be used. ( I am not sure they still make the product)
  6. The skills that defined an optician have all been...

    The skills that defined an optician have all been automated. The customer interaction has always been extremely poor. The ability (with a few exceptions) to direct a customer to proper lens selection...
  7. I have many years experience with all three...

    I have many years experience with all three manufacturers and would say they all fall short in some areas. Operating a free form lab is not a simple task. Plan on having a trained tech on site and...
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    This is my experience managing a lab doing 1800...

    This is my experience managing a lab doing 1800 orders a day. We supplied 85% of the frames for our orders and did not trace anything except the first time we processed the frame. This is what I...
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    They indeed react to visible light but not the...

    They indeed react to visible light but not the the full spectrum. They do not activate to their full potential in a car because the uv is blocked. If they reacted to the full spectrum they would not...
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    Remember Transitions is activated by UV not...

    Remember Transitions is activated by UV not visible light. Most materials block uv except cr and many AR coating are formulated to do the same. So the goal is to not block uv.
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    Hi if your input numbers are being taken with a...

    Hi
    if your input numbers are being taken with a mm scale you will be wrong as often as you are correct. To get the E.D. Of a frame you must box the shape or get from the frame specs or get from your...
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    So you understand a non profit organization can...

    So you understand a non profit organization can make as money as they can their non taxable status comes from their organizing charter. One of the covenants is that it was organized for the public...
  13. You don’t get ISO certification or a patent for a...

    You don’t get ISO certification or a patent for a non existent process. Ask the largest optical companies if they have comparable product and they will tell you No. This is their exclusive product...
  14. The first patent for a Progressive in the US was...

    The first patent for a Progressive in the US was granted to Estelle Glancy on behalf of American Optical in 1924. No product reached the market until the 1960’s. Mostly due to non acceptance of the...
  15. To have a comprehensive understanding how this...

    To have a comprehensive understanding how this works Google patent for antimicrobial AR coating. There are also many articles on the possibility of Covid entering thru your eyes. As an eyecare...
  16. I don’t work for vsp never did never will. Your...

    I don’t work for vsp never did never will. Your jumping to conclusions based on your opinion nothing more. I never said this replaces a mask that would be absurd I did say masks are not 100%...
  17. Copper zinc and silver are anti viral as well as...

    Copper zinc and silver are anti viral as well as anti bacterial. Any added protection is a plus, masks do not filter 100% but recent knowledge from the medical community has concluded that most...
  18. Some technical information. Si is silicone not...

    Some technical information. Si is silicone not silver, silver is ng. Vsp has a patent on the process which means they can create a stack containing one of the antibacterial elements that will still...
  19. The coating works by either having silver oxide...

    The coating works by either having silver oxide or zinc oxide in the stack. The problem with any antibacterial including antibiotics is that they are not 100% effective. Over time you have a surface...
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    Do this simple test to see if there is an...

    Do this simple test to see if there is an effective top coat on the lenses. Take a piece of Scotch tape about 10 centimeter long. Attach 2 centimeters to the front of the lens and suspend it by the...
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    Chris This was a great reply a lot of time and...

    Chris
    This was a great reply a lot of time and thought went into your response. I would like to add a few comments and a few questions.
    I would consider myself a lab rat being I have been running...
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    Actually this fails inspection if the you check...

    Actually this fails inspection if the you check the Rx at the PD it was ordered. You will over see 1 diop vert imbalance. This shows that Prentice rule only works on spherical lenses or lenses at...
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    Patient was wearing same Rx, frame size, base...

    Patient was wearing same Rx, frame size, base curve and lens material with the correct PD with no issues. They are complaining of eyestrain and double vision with the new pair.
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    Within ansi standards

    Let’s get some opinions on this Rx if it is within standard

    R +2.00 -4.00 x 45
    L +2.00 -4.00 x 135

    PD R 31. L 35

    received Rx was correct but the PD was off

    PD R 34. L 32
  25. Lensometers always read back vertex power so you...

    Lensometers always read back vertex power so you should not turn the lens around. The only time you reverse the lens is to read the add power of a lens. The reason that is necessary is because the...
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