A terrific project

says Jo about Inventor's 2020 vision: to help 1bn of the world's poorest see better:
"Silver has devised a pair of glasses which rely on the principle that the fatter a lens the more powerful it becomes. Inside the device's tough plastic lenses are two clear circular sacs filled with fluid, each of which is connected to a small syringe attached to either arm of the spectacles.

The wearer adjusts a dial on the syringe to add or reduce amount of fluid in the membrane, thus changing the power of the lens. When the wearer is happy with the strength of each lens the membrane is sealed by twisting a small screw, and the syringes removed. The principle is so simple, the team has discovered, that with very little guidance people are perfectly capable of creating glasses to their own prescription.
....
For the Indian project he has joined forces with Mehmood Khan, a businessman whose family trust runs a humanitarian programme based in 500 villages in the northern state of Haryana, from where he originates.

There will be no shortage of takers in the region, Khan says. "One million in one year is straightaway peanuts for me. In the districts where we are working, one district alone will have half a million people [who need the technology]." Khan's day job is as Global Leader of Innovation for Unilever, and though his employer will have no direct connection with the scheme, having contact with 150m consumers a day, as he points out, means he is used to dealing with large numbers.

But surely finding funding on this scale will be impossible? "I share a vision with Josh," says Khan. "A thing like this, once it works, you create awareness, you enrol governments and the UN, and the model becomes scaleable. People begin to believe." And from a business point of view, he notes wryly, when poor people become more economically developed they also become potential customers."
Wikipedia article on Joshua Silverandadaptive-eyecare site/.