The Latest LCD Variable Focus Glassess Will Lead The Way To ...

These crystals are exactly the same as that in LCD computer monitors. By changing the strength of current flowing through the liquid crystal, the crystal molecules can rearrange, thereby changing the crystal transparency and focusing ...

Source: http://howu.microbloghost.com/2010/08/11/the-latest-lcd-variable-focus-glassess-will-lead-the-way-to-intelligent-spectacls/