Bionics
| A blind Minnesota man was overjoyed after a retinal implant recently allowed him to see his wife for the first time in over a decade. Allen Zderad lost his sight gradually to retinitis pigmentosa over the years. |
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Allen Zderad, 68, had not seen on his wife or grandchildren in more than a decade. His degenerative eye disease, retinitis pigmentosa slowly stole his sight over the course of his life.
But recently the power of modern medicine in the form of a bionic eye gave him the ability to see his beautiful family once again. In the video above to see the moment Zderad saw his wife, Carmen for the first time in ten years.
The bionic eye, known as the Second Sight Argus II retinal prosthesis system has been under development for more than 25 years. He is the 15th person in the nation to receive it.
The grandfather of ten remembers the faces of his oldest grandchildren, but most of their faces he's never seen.
"I have a lot of fun with my grandkids and family. I think it would be good to recognize when they come in the room, and observe their growing and things like that. My grandkids in Oregon love playing hide and seek – they don't have to hide anywhere except for a corner of a room," Zderad laughed again.
Humor is part of how Zderadcopes, and his curious optimism is the reason by Dr. Raymond Iezzi, a Mayo Clinic retinal surgeon and clinical ophthalmologist, chose Zderad to be the first Minnesotan to receive the bionic eye system. It was approved for implantation by the FDA in January of 2014 after decades of research and an estimated $300-$500 million to develop.
"The retinal prosthesis implant has taken over 25 years to develop. Hundreds of millions of dollars and hundreds of people to bring this forward to this point," said Dr. Iezzi.
Dr. Iezzi hands Zderad a pair of dark tinted sunglasses with a camera embedded on the bridge of the glasses. A battery pack is attached. Zderad, a retired 3M chemist, is suddenly a kid with a new toy.
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After several pre-op tests measuring how much light and movement Zderad is still able to see, he's ready for surgery.
The next morning, it takes three hours in the operating room, while Dr. Iezzi carefully inserts 60 electrodes into Allen's retina. Dr. Iezzi's life's work lies in a tiny chip, as he's spent decades helping engineer a retinal prosthesis. He points out it's not a cure for blindness, but the greatest tool to date.
"It's a bionic eye – in every sense of the word. It's not a replacement for the eyeball, but it works with interacting with the eye, explained Dr. Iezzi. "Mankind has been seeking to cure blindness for 2,000 years or more, but only in the past quarter of a century have we had the electronics and the packaging and all the other things come together to build a retinal prosthesis that could restore sight to the blind."
"It's crude, but it's significant." |
"I'm pins and needles – or on electrodes I should say," said Zderad.
His children and grandchildren are already moved by possibility before the bionic eye is even turned on, and it takes a moment for his miracle to come into focus.
The camera in Zderad's glasses works with a wearable computer pack. It sends information to the electrodes implanted in his retina, replacing the damaged retinal cells, and then sends signals straight to the optic nerve.
"It's the flash and I've got to be able to interpret the changes in that shape," he exclaims.
The scenes look like a scoreboard, with pixels creating mostly black and white images. It's artificial vision, but a genuine gift to Zderad, who immediately also detects some shades of blue. He embraces his wife and Dr. Iezzi, sobbing through a smile.
The moment is perhaps most meaningful to his 13-year-old grandson, Caleb Sorenson, of Lake City. He also inherited RP.
"I knew I was a carrier and we always knew if we had a son he should have a 50-50 chance and we always hoped he wouldn't be that 50," said Mara Sorenson, Zderad's daughter, Caleb's mother.
Caleb now has greater hope for his inherited disease.
"He can succeed," said Zderad, of his grandson. "He's defined not by his limitations but by the ability God has given him...so…I hope he appreciates that."
Caleb is also Dr. Iezzi' s patient at the Mayo Clinic program for people with RP, and through that relationship, Dr. Iezzi asked to meet Zderad, knowing his condition would be progressed enough to respond to the bionic eye.
SOURCE USA Today
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