Smart Contact Lenses May Deliver Medicine Direct To The Eye

While the eyes may not be the windows of the soul, they are a valuable indicator of health and by incorporating smart technology into contacts, may be able not only to help correct eye conditions, but display information back to the wearer.

The Economist reports on a number of developments in the slightly queasy world of sticking smart things in your eye.

The first smart contact lenses are already on the market. The Triggerfish, created by Sensimed, a spin-off from the Swiss Federal Institute of Technology in Lausanne, is a wirelessly powered contact lens designed to help people with glaucoma manage their treatment. It does this by continuously measuring the curvature of the eye over a 24-hour period using a tiny strain gauge, built using micro-electromechanical system (MEMS) technology, which is incorporated into the lens.

But perhaps rather cooler is the idea of building displays into contacts so that images can be projected directly into the wearers eyes. This proves to be a significant technological problem.

The paper reports on the ground-breaking work of Babak Parviz, a researcher at the University of Washington, in Seattle.

Dr Parviz has already demonstrated that red and blue dots, or pixels, can indeed be embedded in lenses, though green will also be required to create a full-colour display. He has shown that the pixels can be powered wirelessly and he has demonstrated that he can shrink the optics required to bring these dots of light into focus, even when they are so close to the eye. So far, however, the closest Dr Parviz has come to creating an actual display is a lens containing a grid of just eight pixels.

Given the ubiquity of high-definition screens containing millions of pixels this may not seem very impressive. But it is worth remembering that this is much more difficult than creating normal displays. Quite apart from the challenges of powering such a small device and bringing the pixels into focus, the small size of a contact lens means that the pixels will have to be much smaller than those in a typical computer monitor or mobile-phone display in order to provide a similar resolution. “Our smallest ones are about 50 microns across,” he says. “We can definitely make them smaller.” He will have to: a pixel on a high-resolution iPhone screen, by comparison, is about 80 microns (millionths of a metre) across.

by Ben Rooney

Source: http://blogs.wsj.com/tech-europe/2011/06/08/smart-contact-lenses-may-deliver-medicine-direct-to-the-eye/?mod=google_news_blog

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For a long we all have been dependent upon the glasses or specs to supplement our poor vision. However, only a few of us wears them all day long. There is no doubt about the fact that this eye-wear is helpful, but at the same time it irritates most of us. Some cannot carry it for long and their helplessness without the specs, irritates them while others find it inconvenient to wear them in activities like playing sports or wearing a helmet for riding a bike.
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2. Hard lenses –
hard lenses are made up with silicone polymers that are responsible for facilitating flow of oxygen to the eyes of the wearer. These lenses are much durable as they are made up with a rigid material and therefore could keep their shape intact, but their application is a little uncomfortable as compared to the ease that soft contact lenses offer.
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Gone were the days when people prefer spectacles for correcting their poor vision. No one used to like that geeky look with thick spectacle lenses on. Even after availability of stylish frames, spectacles did not become much popular as compared to contact lenses. Contacts are quite popular among people of all age groups. In fact, daily disposable contact lenses are also available in the markets that are more of a fashion accessory than a vision aid.
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About VisionCare

Vision care is the leading provider of soft contact lenses in India. The company headquartered in New Delhi, India and is one of the leading distributors of branded soft contact lens in India. Rooted in our company is the firm belief that a healthy eye-sight is essential in living a healthy and well-balanced life and thus driven by this passion to improve eye-care services and provide cutting-edge contact lens solutions to a wider clientele, we have expanded across India to become a leading eye-care contact lens provider. Vision Care has an online product store at www.visioncare.co.in which offers the leading soft lens brands. 


At www.visioncare.co.in, we serve you as your online retailer of replacement contact lenses and associated products. We are committed to provide our customers with a user friendly easy to use site with a wide variety of branded contact lens products to choose from at highly competitive prices. We have built easy to navigate pages that help you quickly locate the exact product you are looking for and then with one click our product page displays detailed relevant information, so that you can order your required product with out any hassles. 


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