New Experimental Technique for Correcting Presbyopia

Discussion in 'Optometry Archives' started by Irv Arons, Jun 8, 2006.

  1. Irv Arons

    Irv Arons Guest

    The following article was just published in the June 2006 issue of
    Medical Laser Report

    Laser-induced bubbles help 'fix' presbyopia

    A tool developed at the University of Michigan (Ann Arbor) allows for a
    potentially noninvasive, painless fix to presbyopia using tiny bubbles
    that help ophthalmologists reshape the eye's lens and restore its
    flexibility and focusing ability. Matthew O'Donnell, professor and
    chair of the U-M Department of Biomedical Research, along with Kyle
    Hollman, assistant research scientist and adjunct lecturer, and
    graduate student Todd Erpelding, developed the method.

    Presbyopia-the inability to focus on close objects resulting in
    blurred vision-affects 100% of people by age 50. The predominant
    belief is that fibers created in the intraocular lens accumulate and
    stiffen, thus making the lens less flexible. Laser correction of the
    intraocular lens for presbyopia has been proposed, but it is risky
    because there is no way to monitor the procedure.

    The U-M tool uses bubbles, ultrafast laser pulses, and ultrasound to
    measure the thickness and rigidity of the lens during laser surgery,
    thus guiding the surgeon as they reshape the lens. It's a new
    application for microscale bubbles, which scientists have experimented
    with for years in the areas of drug delivery, tumor destruction and
    other medical applications. For the treatment of presbyopia, the U-M
    team used ultrafast laser pulses to create tiny gas bubbles within the
    intraocular lens. Before the bubbles diffuse, researchers hit them with
    high frequency sound waves, which push the bubbles against neighboring
    lens fibers.

    "Part of the sound is reflected, and from the characteristic of the
    reflection, you know where the bubble is," O'Donnell said. "It
    uses exactly the same technology as ultrasound imaging." In this way,
    researchers measure how far the bubbles have moved based on the force
    applied, and thus measure the pliability of the lens. "The bubbles
    show you where the laser should cut," O'Donnell said. "If it's
    still too hard, you cut some more. If it's soft enough, you stop."

    Recently the process was tested successfully in pig eyes. The future
    plan is to automate the procedure to quickly cover the entire lens with
    bubbles, he said. The team, which will begin clinical testing this
    year, is talking with several companies about commercial opportunities.
    Irv Arons, Jun 8, 2006
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  2. Irv Arons

    acemanvx Guest

    Noval idea but theres alot more to accomodation than the elasticity of
    the crystaline lens. The ciliary muscles get weak and stiff and many
    other factors. We have accomodation IOLs and they are next to useless.
    The best way is bifocal glasses, monovision or NOT getting refractive
    surgury for your myopia!
    acemanvx, Jun 9, 2006
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  3. Irv Arons

    Neil Brooks Guest

    Perhaps you should get in touch directly with the U of M doctors who
    are testing the procedure.

    I would think that they'd be reluctant to move forward *without* your
    input at this point.
    Neil Brooks, Jun 9, 2006
  4. Irv Arons

    acemanvx Guest

    There is no cure for presbyopia just as there is no cure for old age.
    You can prolong old age and live to 80, 90 even 100 just as you can
    delay needing reading glasses or work around it by being myopic.
    acemanvx, Jun 9, 2006
  5. Irv Arons

    Neil Brooks Guest

    Then perhaps you should save the researchers profound embarrassment,
    and the University and those providing funding, significant dollars.

    I would imagine that they are -- at this very moment -- awaiting your
    sage counsel as to whether or not to proceed ... at ALL.

    Don't be cruel, Ace. Don't make them wait any longer.

    Call them ... and set them straight.
    Neil Brooks, Jun 9, 2006
  6. Irv Arons

    p.clarkii Guest

    Everything seems so obvious and clear when you don't really understand
    much about what you're talking about doesn't it?

    why do you even bother to comment on topics like this? you don't have
    any background at all on the anatomy and physiology of presbyopia. do
    you know the different theories of why presbyopia occurs? do you know
    the attempts that are currently being tried at reversing presbyopia and
    there success rates?

    nothing like being young and dumb!

    p.clarkii, Jun 9, 2006
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