Inventor designs 'tunable' glasses to help one billion in Third World see

THIS IS BRILLIANT!!!!!!!!!!!!!!!!!!


A Brition has designed a pair of glasses which can be adjusted by the wearer without the need for an optician, in an invention which he hopes will help the world's poor.


Prof Joshua Silver hopes his design will enable a billion people in the developing world to receive spectacles for the first time within just over a decade.
A retired Oxford University physics professor, he came up with the idea in what he describes as a "glimpse of the obvious".
His adaptive glasses are designed to be "tuned" by the wearer to suit their eyes without the need for a prescription and can help both short-sighted and long-sighted people.
He set on the idea of developing an adjustable spectacle after a chance conversation in 1985 when he and a colleague were discussing optical lenses.
It took more than 20 years to finally come up a design which can be made cheaply on a large scale.
Working on the principle that thicker lenses are more powerful than thin ones, Prof Silver's spectacles 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.
Once the lenses have been adjusted, the syringes are removed and the spectacles worn just like a prescription pair.
The invention will enable millions of people in poorer parts of the world, where opticians are in short supply, to get spectacles for the first time.
A trial project, supported by the Department for International Development, has already seen thousands of pairs distributed in Third World countries.
He is now preparing to launch an ambitious scheme in India to distribute one million pairs in a year.
His aim is to eventually reach 100 million people a year, with a target of one billion in total by 2020.
Other "simple" British inventions which have transformed the lives of millions of people in the Third World include Trevor Baylis's clockwork radio, which has brought communications to remote areas without electricity supplies.