adaptive optics providing humans with superior vision as good as 20/4!

Discussion in 'Eye-Care' started by acemanvx, Jul 23, 2006.

  1. acemanvx

    acemanvx Guest


    Ultimately, typical vision could be improved from the currently normal
    20/20 to "supernormal" 20/8. *OMG says Ace*

    Max points out that adaptive optics are also used in vision science to
    compensate for aberrations in the eye that affect vision and impede
    efforts to study the living retina. Adaptive optics has made it
    possible to obtain images of the living human retina with unprecedented
    resolution, enabling researchers to see individual light receptors.
    Adaptive optics may also provide normal eyes with supernormal vision. A
    team of Livermore researchers led by Olivier is developing a
    high-resolution liquid-crystal adaptive optics system for human vision
    correction that will be used at UC Davis to study the limits of human
    visual acuity.

    'Super vision' and refractive surgery

    Ophthalmologists already use wavefront sensors to develop custom
    corrections for patients undergoing refractive surgery, but the main
    goal usually has been to achieve nominally perfect 20/20 vision. A more
    ambitious and controversial idea, originally suggested by Williams and
    two colleagues in 1997, is to use adaptive optics to measure
    higher-order aberrations, and correct them to provide "super
    vision" more acute than is possible normally.4

    This idea excited the refractive-surgery community, which saw a
    potentially lucrative new market in improving vision beyond what was
    once considered perfection. Williams now worries that the potential of
    surgical correction for higher-order aberrations is being overplayed
    for most people. The technique is attractive for people with severe
    higher-order aberrations that are otherwise hard to correct. "If you
    enter the office with a lot of higher-order aberrations, this
    customized vision correction can reduce those aberrations and give you
    a better result," he says. However, he warns that the refractive
    surgery also introduces new aberrations, so patients who start with
    only small high-order aberrations will likely have stronger aberrations
    after surgery.

    My comments: This goes to show that laser surgury induces aberrations
    in every eye. Normal virgin eyes that arent highly aberrated will end
    worse off.

    My comments: Note that adaptive optics can measure aberrations and the
    mirrors can correct most to at least 20/10 if their retina is capable.
    But laser surgury induces more aberrations so your vision actually
    acemanvx, Jul 23, 2006
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