Thinnest Lenses

Discussion in 'Optometry Archives' started by Jim Wilkinson, Sep 15, 2003.

  1. I want to get new eyeglasses, but I want to have the lenses be as thin
    as possible.

    I currently have polycarbonate lenses, but they're still quite thick.
    The thickness creates a white ring on the bottom of my glasses.
    They're not quite "coke bottles," but they're also not very
    attractive. Ideally, I would like lenses that look practically
    invisible, and that can only be achieved with lenses that are no
    thicker than the frames I choose.

    Are the "featherwates plus" at lenscrafters, or the "microthins plus"
    at pearlevision the thinnest lenses. if not, what are my other
    options?

    - Jim
     
    Jim Wilkinson, Sep 15, 2003
    #1
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  2. Jim Wilkinson

    Mark A Guest

    Featherwate Plus is not really a particular lens, but a name that
    LensCrafters uses to confuse consumers. They buy these lenses from the major
    manufacturers, but it is sometimes difficult to get them to tell you exactly
    what it is. The lens used for the Featherwate Plus has changed over the
    years, but as of about a year ago, they were polycarbonate. Many of the
    LensCrafters sales people are so stupid, they don't even know what
    polycarbonate is, much less that it is used in the Featherwaite Plus.

    Polycarb is 1.59 index. But you probably want a 1.67 or 1.70 index lens. The
    higher the index the thinner the lens, but the worse the optical qualities.
    The one major exception is polycarb, which has even worse optics than a 1.70
    lens.

    You will probably need to go to an independent optical store or optometrist
    and ask for a name brand very high index lens (1.67 or 1.70). Expect to pay
    a lot more than you would at Lenscrafters or Pearle. But you might try
    Wal-Mart/Sams or Costco to see what they have available in that index. Hoya
    is one company that makes a good quality 1.70 index lens material called
    1.70 EYRY, but you may have to search for someone who will order a Hoya lens
    (use the yellow pages and phone them). Do not expect less than 1 week
    turnaround for a very high index lens.

    Make sure you do not get you lens edges polished. That is what causes the
    white ring on the bottom. They don't tell you this because the "extras" like
    polishing are very profitable to the optician.

    Maybe you need laser eye surgery to get a lens as thin as you want.
     
    Mark A, Sep 15, 2003
    #2
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  3. Jim Wilkinson

    Mark A Guest

    Is that available in the US?
     
    Mark A, Sep 15, 2003
    #3
  4. Jim Wilkinson

    S Akky Guest

    Thomas Hofmann put fingers to keyboard and typed...
    Small typo there, stylis is 1.67, thinnest plastics are 1.74 ;-)
     
    S Akky, Sep 15, 2003
    #4
  5. Jim Wilkinson

    Terry Horton Guest

    I have a pretty strong rx (about -3s -3c in the worst eye) and lenses
    of three indexes - Hoya Phoenix 1,53, Sola Vizio 1.66, Hoya Eyry 1.70.

    The difference between the 1.53 and the other two is fairly dramatic.
    But it's in a 54mm sunglass frame, and as Dr. Tyner mentions, a larger
    lens diameter results in greater edge thickness. Were this lens's
    thickness not masked by the frame I would consider it unacceptable in
    my rx.

    The 1.70 and 1.66 are very close in edge thickness in identical 52mm
    drill-mount frames. I have a second Vizio 1.66 in the same frame but
    at 48mm diameter, and the difference in edge thickness relative to the
    52mm is significant. I would not want to go higher than 52mm in my
    rx, but find the few extra mm of lens and slightly wider bridge of the
    52mm a good optical compromise for the slight extra thickness.

    Ask for the brands you read about in this forum by name.
     
    Terry Horton, Sep 15, 2003
    #5
  6. Hi Robert,

    Your response was helpful. who does a better job with the
    anti-reflective lenses? lenscrafters or pearlvision? also, what's a
    "straight back" bevel? I don't know what that means.

    I can't seem to find my prescription, but I'll post it as soon as I
    do.

    Thanks,
    Jim
     
    Jim Wilkinson, Oct 3, 2003
    #6
  7. Jim Wilkinson

    Mark A Guest

    Probably neither. The best AR coating is put on at the lab by the major lens
    manufacturers such as Sola, Pentax, Zeiss, etc. Crizal is also a good
    coating available on Essilor and some other products. But the chain stores
    usually use a cheaper no-name AR coating.
     
    Mark A, Oct 3, 2003
    #7
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