Posts Tagged ‘Eyes’

Color-Shifting Contact Lenses Alert Diabetics to Glucose Levels [Contacts]

Diabetics are saddled with the unenviable task of checking their blood sugar levels constantly. But a new non-invasive technology lets diabetics keep tabs on their glucose levels with contact lenses that change colors as their blood sugar rises and falls.

Nanoparticles — is there anything they can’t do? — embedded in the hydrogel lenses react with glucose molecules in naturally occurring tears. A chemical reaction then causes the lenses to shift their hues, alerting the wearer to falling or spiking blood sugar levels. The wearer can then make the appropriate adjustments to his or her blood sugar, all without having to carry around (and use) devices for drawing and analyzing blood.

U. of Western Ontario Professor Jin Zhang has just collected $216,000 from the Canada Foundation for Innovation as a result of the breakthrough process to develop other applications for multifunctional nanocomposites, which can be used in everything from biomedicine to food preservation to packaging. We think a head-up display for glucose levels is pretty good, but if nanocomposites can also make the packaging on that blood-sugar-leveling candy bar biodegrade more quickly, all the better. [Institute of Nanotechnology]

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Stem cell therapy restores British man’s eyesight
Russell Turnbull, now 38, lost almost all the sight in his right eye after trying to break up a fight and being sprayed with ammonia 15 years ago. The result for him was what's known as Limbal Stem Cell Deficiency, which caused him great pain, the need for therapeutic treatment, and economic dependency. Good news for Russell is that he can put all that behind him now, after becoming one of the first recipients of a new stem cell grafting procedure, whereby healthy tissue from his left eye was implanted into his right and -- just like a video game medpack -- restored his vision to normal. For the moment, this treatment is limited to patients with at least one healthy eye, but given the pluripotent nature of stem cells, it is hoped that tissue from elsewhere in the body could one day be used to regenerate damaged parts, such as the cornea in this case. You may find further enlightenment in the video after the break.

Continue reading Stem cell therapy restores British man's eyesight

Stem cell therapy restores British man's eyesight originally appeared on Engadget on Wed, 23 Dec 2009 04:27:00 EST. Please see our terms for use of feeds.

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Careful, You’ll Poke an Eye Out with That Thing [Eyeball Removal]

How might one repair a cyborg's eye in the future? Why, with this handy eyeball removing tool. How does one forget what's seen in this image? Macallan 12 years, neat, that's how. [Bloomers and Bows via Boing Boing Gadgets]




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Intelligent Learning Retinal Implants to Adapt to Real Eyes [This Cyborg Life]

A Swiss company called IMI has been putting its "Intelligent Retinal Implant System" through clinical trials for the past three years. When it's ready, it could help restore sight to the blind.

The use of a high-speed digital signal processor allows the provision of "intelligent information" to the implant (and the nerve cells) by using tuneable software to approximate the information processing normally carried out by the healthy retina. The entire process enables patients to optimize their visual perception during the learning phase. Indeed, using the patient's feedback on perception as an input for the tuning of The Pocket Processor is the unique, patent-protected feature of the System and constitutes the 'learning' capability of the Learning Retinal Implant System.

The next logical step is, of course, enhancing vision beyond what we're born with. When these things become optional for people with healthy vision, you'll know we're really living in the future. [IMI Devices]




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Forget Designer Purses, I Want Some Designer Eyeballs [Vision]

LASIK's been around a while, and somehow it was only a matter of time before designer vision, corneas custom-tailored to lifestyle and career, started to turn common. Could laser eye surgery will become the new graduation boob job?

We upgrade, update, and customize nearly everything, so why not our vision too? Reach for the stars and all that jazz. And even the tech fits the theme: some more common optical surgical procedures are actually based on NASA technology:

Wavefront technology, originally developed by NASA to aid the focus of the Hubble Space Telescope on distant stars, measures up to 250 spots in the pupil to provide a precise map of the cornea and iris. This offers the potential to correct problems not addressed by glasses, such as halos around lights at night or glare.

Fighter pilots, snipers, long-distance drivers, politicians, supermodels, and your average Sally or Joe Smith are getting eye surgery. Why? Some are doing it for vanity, to no longer have to wear glasses they may consider unsightly, or contacts that may be a hassle. Others are doing it to advance in their careers: some pilots wouldn't be allowed to fly without meeting certain vision requirements, and others just wantbetter than normal vision.

Gradually it's becoming more and more common for patients to request procedures which will over-correct or modify their corneas with goals other than simple 20/20 vision in mind. Those pilots might want better night vision and the speech givers want to avoid wearing reading glasses and request monovision. That's great, but what about that Yankees catcher who gets surgery to see the balls flying at him better? While no one will care much about other cases, there could eventually be argument that his vision surgery is some form of unfair enhancement.

Potential arguments and debates aside, it's not all just about boosting career aspirations and vanity though. Dr. Julian Stevens of Moorfields Eye Hospital, an expert on laser refractive surgery, gives an example of how "customized" vision helped a patient's quality of life:

"One of my patients led an active life and had high-quality distance vision. When he became paralyzed from the neck down, his world became smaller - reading and television. Spectacles on your nose become painful if you can't shift them." The solution? Mr Stevens made him slightly short-sighted.

I must admit that this particular example made me cringe a little bit. What are the ethics of downgrading someone's vision at his or her request even if it's for an improvement in lifestyle. No matter. There's some great potential for both good and evil in it, so I'll be paying attention to advances in this whole custom-tailored vision trend, because my death glare definitely needs some upgrading. [Times Online]

Photo by bogenfreund




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Video: doctors implant tooth into eye, restore sight, creep everyone out
Osteo-odonto-keratoprosthesis. It's a real procedure that really does revive people's ability to see, yet we get the feeling that people will be more, um, excited about how it's done than why it's done. The seemingly Mary Shelley-inspired doctors extract a tooth from a blind person and drill a hole through it, where a prosthetic lens is placed, and the resulting macabre construction is implanted into the blind person's eye. The tooth is necessary as the body would reject an artificial base. It's not at all pretty, and it cannot repair every type of blindness, but it's still a major step forward. To hear from Sharron Thornton, the first American to have undergone the procedure, check the video after the break, but only if you can handle mildly graphic content -- you've been warned.

[Via Daily Tech]

Continue reading Video: doctors implant tooth into eye, restore sight, creep everyone out

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Video: doctors implant tooth into eye, restore sight, creep everyone out originally appeared on Engadget on Tue, 22 Sep 2009 06:25:00 EST. Please see our terms for use of feeds.

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BrainPort lets you see with your tongue, might actually make it to market
We first saw the crazy BrainPort in 2006, but the intervening time hasn't been wasted by its developers, who've brought the quirky visual aid to the cusp of commercial viability. If you'll recall, the device translates signals from a head-mounted camera to electrical pulses that lightly zap your tongue in response to visual stimuli -- early results have shown people can regain a good bit of their spatial awareness and even read large writing. The next step is FDA approval, which is expected by year's end, meaning that the BrainPort could arrive as early as 2010. There is a steep entry fee though, with prices expected to begin at $10,000, but the very fact you'll be able to buy it is a milestone in our book. Edifying video after the break.

[Thanks, Toy]

Continue reading BrainPort lets you see with your tongue, might actually make it to market

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BrainPort lets you see with your tongue, might actually make it to market originally appeared on Engadget on Fri, 14 Aug 2009 14:10:00 EST. Please see our terms for use of feeds.

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Tiny Telescopes Help the Blind See Again [Bionic Eyes]

The bionic eye's inexorable advance continued this weekend, as doctors reported they were able to implant tiny telescopes (telescopes!) into the eyes of patients suffering from macular degeneration.

Better still, for squeamish emergency room pansies like myself, this is a "brief" outpatient procedure, say the inventors at VisionCare Ophthalmic Technologies.

Just pop a telescope in your bad eye and you'll be avoiding home furniture by the evening. Well, after a round of intense physical therapy anyway. It seems the new vision takes some getting used to, although none of the 200 patients who tested this over the past five years reported any falling down or injury, said Dr. Henry Hudson, a retina specialist in Tuscon.

And while the devices won't allow patients to view faraway stars (not that powerful), they will allow them to see partial faces where there was once a gaping hole in their vision. "People can use it to recognize faces in a social setting," said Dr. Janet P. Szlyk. "That's a huge advance."

A Food and Drug Administration advisory panel gave the tele-eyes their unanimous approval in March, and the full board is expected to give its blessing later this year. Europe is already using it. [NYT via Nick Bilton's Twitter]




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