This technology was originally invented by Stephen Gray, a British astronomer way back in eighteenth century.
Gray realized that by exploiting the way in which droplets could bend light, it was possible to use them to magnify the appearance of objects. This unusual set-up was to become the first microscope known to use lenses made out of liquid.
Success of Grey finally catch on by the cell-phone industry, as the tiny autofocus optics that rely on changing the shape of a liquid meniscus shall make mobile phone cameras smaller and smarter.
Like the old story of two prisoners, where one could only see the bars of the small window, while the other one able to see the large blue sky behind the bars. Besides commercializing the technique prof. Josh Silver could able to visualize a broader prospect of the technology.
Josh thought to make glasses for the poor which could be tuned by the user to adjust their own vision and thus could eliminate the need for optician and expensive specialist equipment, and to bring affordable spectacles to billions of poor people who are living a helpless life due to poor vision.
Josh is now ready and confident to serve glasses to billion of world's poorest people by 2020.
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.
Josh and his team already distributed 30,000 pairs of adjustable spectacles in 15 countries, and plans to launch a trial in India with one million pair of glasses within one year. The target, within a few years, is 100 million pairs annually.
According to Josh the impact of glasses within the reach of poor people will be enormous. It will improve the most important issue of the world, the literacy rate. Fishermen will be able to mend their nets, women shall weave clothing, tailor and mechanics don't have to retire from work early.