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Medicated Lenses Could Make Eye Drops Obsolete

Putting in eye drops is a pain. Applying drops into your eyes is a hard enough challenge, made even more frustrating by the fact that one mistimed blink will find you with drops streaming down your cheeks. Annoyances like this have led to bigger problems, like 59-percent of glaucoma patients not using their medicated eye drops despite the risk of going blind, Wired reports. To remedy this, researchers have developed contact lenses that can automatically dispense medication where and when it's needed.

Described in a paper published in the July issue of Investigative Ophthalmology & Visual Science, the lenses deliver a steady, concentrated stream of medication over a period of 30 days. The paper's co-author, Daniel Kohane, told Wired, "The main way our lens differs is that it can provide large amounts of drug released at constant rates for long periods of time, which previous discoveries have not been able to do."

The drugs, suspended in a gel around the edge of the lens, don't affect vision. Right now testing has only been performed in labs, but animal tests are coming soon, and hopefully within a year these will be on human eyes. [From: Wired/CNN]

Computers, Video Games

Computer Game Helps Return Vision to Stroke Victims

Computer Training Helps Return Vision to Stroke Victims
Despite all the negative things people say about video games, we've recently learned that playing them can help to improve your eyesight. If that doesn't convince you that video games can have positive effects, then take a look at this: According to Reuters, scientists are successfully using a type of primitive video game to rehabilitate stroke victims' debilitated vision. Amazingly, the method has been able to return as much as 90-percent of some patients' vision.

As part of the project, researchers at the University of Rochester Eye Institute show screened images of dots and other visual artifacts to stroke victims, asking the patients to identify the shapes. Patients often say that they can see something, even if they can't tell what it is. But, when asked to guess what they're seeing, they often guess correctly. Although strokes can result in brain damage, the eyes are left intact. This means the victims just need to be taught how to process those visual signals again. That's exactly what the program does, and some patients have regained enough of their eyesight to even return to driving.

Maybe this is another good reason to get Wii consoles at retirement homes. [From: Reuters]

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TV, Televisions

Are You Too Short-Sighted to Enjoy HDTV?


If Vision Express was looking for some attention, it just got it. A recent study by the optician chain found that 60-percent of Britons had avoided an eye test over the past year, with that number rising to 79-percent in Scotland.

Phillip Hyde, dispensing optician and head of professional services at the firm, was quoted as saying that "even a marginally short-sighted person sitting on a sofa watching an HD broadcast may not see the full benefits in enhanced image quality." As if that wasn't comical enough, he continued by saying: "If you're investing in HDTV, you ought to have your eyes checked to make sure you get the full benefit."

You heard it here first, folks -- factor in the cost of an eye exam before buying your next HDTV, or you'll regret it. Forever. [Image courtesy of Lenslinger]

Computers

LED Cases Tell You When to Change Contact Lenses

Digital Lens Cases Tell You When to Change Contacts
There comes a time in every disposable contact lens' life when it must move along to the big eyeball in the sky; when it's so slime-encrusted and foggy that the only thing it should be seeing is the inside of a trash-bin. If you have a hard time remembering just when it's time to break open a fresh pair, Countact is for you.

It's a simple enough product, a contact dish that has a digital timer in the middle. It counts down from anywhere between 14 and 30 days (based on your settings), giving you a display of the remaining life of your lenses. When it hits zero, a beeper starts chiming and then you'll know what you have to do. $35 for four seems like a pretty good deal -- the only catch is that the things only last for a paltry three months and, once the built-in battery is dead, it's time to toss the thing and get another. That's hardly environmentally friendly -- but then again, neither are disposable contacts. [From: Latest Buy, via Boing Boing]

Glaucoma-Monitoring Contact Lenses Crafted at UC Davis

Far from the first circuit-laden contact lens we've laid eyes on (ahem), researchers at UC Davis have more than bragging rights in mind with their "smart" contacts. The devices are infused with a "pattern of conductive silver wires, which could be used to measure pressure inside the eye."

The material, dubbed polydimethylsiloxane (PDMS), would boast antimicrobial properties and could enable scientists to better study glaucoma. How so? By sending pressure data to computers sans wires. Better still, the contacts also include the ability to automatically dispense medication into the eye, making this beneficial in more ways than one.

The creators are expected to apply for approval to begin testing the lenses in humans here shortly, and barring any unforeseen (sorry, totally unintentional there) setbacks, we would hope these could be put to use within the next few years.

[Via medGadget]

Audio/Video, Computers

"Robo-Moth" Gives Hope to Amputees



Further hope that victims of paralysis or amputation could one day reclaim some form of motion came this week in the form of a robotically-enhanced, tobacco-chewing moth.

The Society for Neuroscience's yearly gathering in San Diego saw a presentation on research in which a tobacco hornworm moth's brain was connected to electrodes and amplifiers at the base of a fairly common kit of robotic parts. When the insect's highly developed eyes, evolved for evading predators and mating, would shift left or right, the attached robotic parts would react accordingly.

In order to get the "robo-moth" to shift it's eyes, the scientists placed it in tube with a 14-ich tall revolving wall covered in vertical stripes. The moths, which only live about a week, would then track the stripes resulting in motion with the longest tracking time lasting nearly a minute and a half.

While limited at the moment, the device's use in harnessing electric impulses in such a small brain gives way to added possibilities from using insects as bomb-detectors to the aforementioned ambitions for practical human applications.

From LA Times

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One Step Closer to the Bionic Man

bionic eyeThe 'Six MillionDollar Man' may be ready sooner than you think.

U.S. Scientists are conducting research that may one day lead to the creation of a bionic eye. This optical prosthetic could one day restore vision to those who suffer from glaucoma and other vision-inhibiting diseases.

After training monkeys to look at points of light, researchers inserted ultra-thin electrodes into their brains to stimulate the areas that process visual information. The scientists were able to cause the monkeys to move their eyes the same way they would when following the points of light.

Plenty of hurdles must be overcome, however. In order to create a high enough resolution image for humans to recognize patterns in the real world, the number of electrodes implanted will have to be increased by a factor of at least 100.

Eventually, the patient would wear a pair of glasses with a built-in digital camera that would wirelessly transmit data to a device inside the brain. This device would stimulate the electrodes implanted in the visual cortex to -- finally -- create images that represent what's going on in the real world.

Not quite Steve Austin's X-ray-like vision, but a mind-blowing possibility nontheless.

From BBC

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