Glasses that change with eye power
24 Dec 2008, 0008 hrs IST, ANI
LONDON: A British scientist has designed a unique pair of glasses that can be adjusted by a wearer without any optician’s help, and one million pairs of which will soon be distributed in India.
Professor Joshua Silver is hopeful that his self-adjusting glasses could enable a billion people in the developing world to receive spectacles for the first time within just over a decade.
Silver, a retired Oxford University physics professor, is even preparing to launch an ambitious scheme in India to distribute one million pairs in a year. He revealed that he came up with the idea in what he describes as a "glimpse of the obvious", reports the Telegraph.
The adaptive glasses are designed in such a way that they can be "tuned" by the wearer to suit their eyes, and that too without the need for a prescription. In fact, the spectacles can help both short-sighted and long-sighted people.
After 20 years’ of research he has finally come up with a design which can be made cheaply on a large scale. He focussed on the principle that thicker lenses are more powerful than thin ones. Using this principle he designed spectacles that can be adjusted by injecting tiny quantities of fluid.
The tough plastic glasses have thin sacs of liquid in the centre of each lens. They come with small syringes attached to each arm with a dial for the wearer to add or remove fluid from the lens. After adjusting the lenses, the syringes are removed and the spectacles can be worn just like a prescription pair. The invention would provide spectacles for the first time to millions of people in poorer parts of the world, where opticians are in short supply.