Adjustable Liquid Filled Glasses- Of course!

Chatting to my GP, I was enthused to hear of the invention of glasses that could be adjusted to the individual's sight without the need for an optometrist. I was surprised that I hadn't heard of this sooner!
http://www.theguardian.com/society/2008/dec/22/diy-adjustable-glasses-josh-silver

It is one of those ideas that makes absolute sense, why hadn't this sleek design been stumbled upon before?! But it was the mind of Josh Silver, Professor of Physics at Oxford University, to answer his own question of the possibility of adjustable lenses. I was also delighted to see that the aim for this was 'to offer glasses to a billion of the world's poorest people by 2020'. Making the glasses to your prescription- not the other way around.
This is a brilliant example of how physics can be applied to aid medical needs of the many. As a physics student, fascinated by light and vision, it is an exciting prospect. I also admire the charitable nature of Silver's ambition and like to see it as a flagship for how academia can improve the quality of life for so many in need. I find this truly inspirational. 
Here's a link to a TED talk, with the prof himself showing how they can be used:
https://www.youtube.com/watch?v=tpKWHSsBpnE