How to make your own eyeglasses for about one pound: an Oxford technology created to benefit the developing World
Professor Joshua Silver talks about his invention of the self adjusting spectacles. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/
How to make your own eyeglasses for about one pound: an Oxford technology created to benefit the developing World
Professor Joshua Silver talks about his invention of the self adjusting spectacles. Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales; http://creativecommons.org/licenses/by-nc-sa/2.0/uk/