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Thread: a puzzle...for me at least

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    Master OptiBoarder opty4062's Avatar
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    a puzzle...for me at least

    Pt came in with specs dispensed about a month ago. He complains of vertical glare around light bulbs (specifically the ceiling fan, lamps in his house) in the distance. I can also see the glare myself looking through his lenses.
    They are 1.67 trifocals, transitions with carat advantage coating. They are identical to specs purchased two years ago from our office, same material, base curve, segs, frame, even rx within a quarter diopter cylinder. The previously purchased pair show no glare.
    Any thoughts?

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    Master OptiBoarder OptiBoard Silver Supporter Jubilee's Avatar
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    Is the reflex color from the AR the same?
    "Some believe in destiny, and some believe in fate. But I believe that happiness is something we create."-Something More by Sugarland

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    Is it a high minus lens with a very thin center? Look for cracking and crazing of the coating.

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    Master OptiBoarder opty4062's Avatar
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    One reflex color is green, one is purple. The rx is
    -3.50-0.50x145
    -5.75-2.25x16
    add +2.25
    It has slab off as does previous pair to address diplopia in the near. The near in the new pair is fine, glare only occurs in the distance.

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    Master OptiBoarder DanLiv's Avatar
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    Quote Originally Posted by fjpod View Post
    Is it a high minus lens with a very thin center? Look for cracking and crazing of the coating.
    +1. Sounds conspicuously like AR crazing.

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    If they have been exposed to heat, ie adjusting the frame (if it's a zyl) with an air warmer, is a good recipe for crazing the A/R on a 1.67 lense.
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    Are the edges polished? could be catching glare from edge polish?

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    Master OptiBoarder OptiBoard Silver Supporter rdcoach5's Avatar
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    I had a patient with a similar problem. I looked at the lenses under a slit lamp microscope and could see that the fining marks had not been completely polished out.
    You need to re-make them.

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    Master OptiBoarder opty4062's Avatar
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    Remake came back with no glare. I wish I had thought about looking through a slit lamp. Anyway thanks for the help!

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    I am also convinced with all the conversation made to this thread and it gives me the nice information that how we can get really nice deals with the lenses.

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