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Thread: Engineers invent a noninvasive technique to correct vision

  1. #1

    Default Engineers invent a noninvasive technique to correct vision

    Columbia Engineering researcher Sinisa Vukelic has developed a new non-invasive approach to permanently correct vision that shows great promise in preclinical models. His method uses a femtosecond oscillator, an ultrafast laser that delivers pulses of very low energy at high repetition rate, for selective and localized alteration of the biochemical and biomechanical properties of corneal tissue. The technique, which changes the tissue's macroscopic geometry, is non-surgical and has fewer side effects and limitations than those seen in refractive surgeries. For instance, patients with thin corneas, dry eyes, and other abnormalities cannot undergo refractive surgery. The study, which could lead to treatment for myopia, hyperopia, astigmatism, and irregular astigmatism, was published May 14 in Nature Photonics.
    "We think our study is the first to use this laser output regimen for noninvasive change of corneal curvature or treatment of other clinical problems," says Vukelic, who is a lecturer in discipline in the department of mechanical engineering. His method uses a femtosecond oscillator to alter biochemical and biomechanical properties of collagenous tissue without causing cellular damage and tissue disruption. The technique allows for enough power to induce a low-density plasma within the set focal volume but does not convey enough energy to cause damage to the tissue within the treatment region.
    "We've seen low-density plasma in multi-photo imaging where it's been considered an undesired side-effect," Vukelic says. "We were able to transform this side-effect into a viable treatment for enhancing the mechanical properties of collagenous tissues."

    The critical component to Vukelic's approach is that the induction of low-density plasma causes ionization of water molecules within the cornea. This ionization creates a reactive oxygen species, (a type of unstable molecule that contains oxygen and that easily reacts with other molecules in a cell), which in turn interacts with the collagen fibrils to form chemical bonds, or crosslinks. The selective introduction of these crosslinks induces changes in the mechanical properties of the treated corneal tissue.
    When his technique is applied to corneal tissue, the crosslinking alters the collagen properties in the treated regions, and this ultimately results in changes in the overall macrostructure of the cornea. The treatment ionizes the target molecules within the cornea while avoiding optical breakdown of the corneal tissue. Because the process is photochemical, it does not disrupt tissue and the induced changes remain stable.
    "If we carefully tailor these changes, we can adjust the corneal curvature and thus change the refractive power of the eye," says Vukelic. "This is a fundamental departure from the mainstream ultrafast laser treatment that is currently applied in both research and clinical settings and relies on the optical breakdown of the target materials and subsequent cavitation bubble formation."


    Read more at: https://phys.org/news/2018-05-noninvasive-technique-vision.html#j
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  3. #2

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    idk anything explained in that article
    A savage barbaric tribal society where thugs parade the streets and illegally assault and murder innocent civilians, yeah that is the alternative to having police. Oh wait, that is the police

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  4. #3

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    Quote Originally Posted by Warrior_of_Freedom View Post
    idk anything explained in that article
    Apparently lasers can be used to correct eyesight

    I wonder if this works with laser pointers
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  5. #4

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    Quote Originally Posted by TheTexan View Post
    Apparently lasers can be used to correct eyesight

    I wonder if this works with laser pointers
    DIY it on yourself and make a youtube video. I watched one about a guy who did his own dental work. It was pretty entertaining.
    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.

  6. #5

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    Back in the early 2000’s a company called Sunrise Technology received FDA approval for a system called LTK, Laser thermal keratoplasty.

    The procedure employs a holmium laser to place a ring of concentric laser burns on the cornea between 6 mm and 7 mm in diameter. These burns cause a ring of constriction on the peripheral cornea causing the cornea to steepen making the eye focus better at near. This procedure may regress somewhat over time. It is similar to the conductive keratoplasty (CK) procedure where a micro-needle high frequency probe is used to make a ring of corneal burns in a similar fashion.

    I invested a good bit of money in this company and was lucky to get out without losing too much. The big issue was regression which happened in a relatively short time. This sounds similar...
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  7. #6

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    Affordable In-Home LASIK Surgery You Can Do Yourself!
    http://www.lasikathome.com/

    (its a joke, not real)
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    The FAILURE of the United States Government to operate and maintian an
    Honest Money System , which frees the ordinary man from the clutches of the money manipulators, is the single largest contributing factor to the World's current Economic Crisis.

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  8. #7

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    Quote Originally Posted by Suzanimal View Post
    DIY it on yourself and make a youtube video. I watched one about a guy who did his own dental work. It was pretty entertaining.
    I've heard about a guy who does his own hair.
    Truth is a social construct. 👁👁

  9. #8

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    Quote Originally Posted by timosman View Post
    I've heard about a guy who does his own hair.
    Tube or it didn't happen.
    Quote Originally Posted by Ron Paul View Post
    The intellectual battle for liberty can appear to be a lonely one at times. However, the numbers are not as important as the principles that we hold. Leonard Read always taught that "it's not a numbers game, but an ideological game." That's why it's important to continue to provide a principled philosophy as to what the role of government ought to be, despite the numbers that stare us in the face.

  10. #9

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    Quote Originally Posted by Suzanimal View Post
    Tube or it didn't happen.
    https://www.ronpaulforums.com/showth...authorized-War
    Truth is a social construct. 👁👁

  11. #10

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    Quote Originally Posted by timosman View Post
    I've heard about a guy who does his own hair.
    Trump?
    1776 > 1984

    The FAILURE of the United States Government to operate and maintian an
    Honest Money System , which frees the ordinary man from the clutches of the money manipulators, is the single largest contributing factor to the World's current Economic Crisis.

    The Elimination of Privacy is the Architecture of Genocide

    You are Ron Paul's Media!

    Quote Originally Posted by Zippyjuan View Post
    Our central bank is not privately owned.






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