World’s first whole-eye transplant.

imhotep

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  • Mar 29, 2017
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    The first face transplant to also include an eyeball was a surgical coup — but restoring vision remains a challenge.

    For Aaron James, it still hasn’t quite sunk in that he received the first successful whole-eye transplant in history. “It just blows my mind being a part of something this big,” says the 47-year-old father from Hot Springs, Arkansas.

    In 2021, James was injured in an electrical accident while working as a high-voltage lineman. He lost his dominant left arm, left eye, chin and nose. For two years, he was unable to eat solid food, taste, smell or talk normally.

    In May 2023, he received the first whole-eye and face transplant at New York University (NYU) Langone Health in New York City. More than a year after the surgery, his transplanted eye remains healthy — the retina can even respond to light — but James cannot see out of it.
    “It is a technically brilliant operation,” says surgeon Bohdan Pomahač at Yale School of Medicine in New Haven, Connecticut, who in 2011 performed the first full facial transplant in the United States, but was not involved with James’s case.
    A large medical team transplanted the whole left eye, the bony socket around it, the nose, a piece of chin bone and the associated muscles, nerves and blood vessels to James from a donor whose brain showed no functional activity. The surgery took about 21 hours.

    Doctors never expected James to regain sight in the transplanted eye, says Daniel Ceradini, a surgeon at NYU Langone Health and first author of the study. That’s because there was no evidence that the donor’s optic nerve could successfully reconnect to James’s brain. The optic nerve, which sends information from the retina to the brain, is part of the central nervous system, and how to regenerate that system is a mystery. But the operation does take researchers a step closer to an eye transplant that could one day restore vision, which, Ceradini says, has been “considered a holy grail”.
     

    Stimulus mind

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  • Feb 27, 2021
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    දතක්? ඇහැ වෙනුවට දතක් දානවද මේකේ?
    Patient ගෙන් හරි, donor කෙනෙක්ගෙන් හරි ගත්ත දතකයි, හක්කෙයි පටකවලින් තමයි ඔය surgery එක කරන්නෙ. ඔය ඔපරේෂන් එකේ සංකීර්ණ පියවර කීපයක්ම තියෙනවා. නෙට් එකේ "Osteo-odonto keratoprosthesis" කියලා සර්ච් කරලා බලන්න.
     

    imhotep

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  • Mar 29, 2017
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    TFS සහෝ. :love2:(y) මේ දතක් පාවිච්චි කරලා eye sight එක දෙන surgery එක කොච්චර සාර්ථක ද?

    The method & technique is pretty old, probably 60 years or so but only put into action at a much later time. Pioneer work by the Italian eye surgeon Professor Benedetto Strampelli in the 1960s. Several innovations made the original Strampelli technique to be improved and MOOKP evolved (Modified or Modern)

    It's a muti-stage, time consuming process but those who had the sight claim it's worth every bit. It's done for those with bilateral corneal blindness. The procedure involves extracting one tooth and some of its surrounding bone to create the OOKP.
    An upper or lower canine tooth is usually selected. This is because the canine teeth have the biggest and strongest root compared to other teeth. They also tend to have stronger bone holding them in place.

    Note- The Canine is usually referred to as the eye-tooth :ROFLMAO:

    The tooth is sliced lengthwise and polished to create a plate. A hole is then drilled into the center of the plate to create a space for the optical device. The device is cemented into the hole, and the combination (the OOKP) is then implanted into the patient’s cheek for around three months.
    During these three months, the body keeps the tooth and bone alive and allows it to form connective tissue and blood vessels. This helps ensure that the eye doesn’t reject it upon implantation.

    To answer your query, cohort studies show that even after 18 years about 85% success. To sum up, Modified OOKP surgery for corneal blindness of different etiologies may provide, in the long-term, anatomically stable corneal prosthesis as well as an effective, rehabilitating recovery in visual acuity.

    Note - If the canine cannot be used there's another alternative Tibia -KPro. The use of tibial bone is an option. The anatomical results in the long-term are said to be comparable to OOKP but the incidence of other complications (such as mucous membrane necrosis and retroprosthetic membrane formation) are more than OOKP. Also the functional success rate of OOKP is signifcantly higher.