Nippon Glass Co. has created a glass that is almost invisible to the naked eye. The new glass works by using an anti-reflective film on each of the front and back sides of the glass that allows for 99.5% of light to pass through it. Normal glass, on the other hand, usually allows for only 92%, reflecting 8% back at the viewer. Hopefully we'll see this innovation being used with smartphones in the near future! However, I wouldn't recommend using this technology on glass doors. That could really hurt.