This seems like a really clever technology. Their glasses use a notch filter to block the frequencies of light that most confuse the red vs. green cones of colorblind people.
“The general class of filters that are designed by our method are called multi-notch filters: they contain one or more sharp “cutouts” in the visible spectrum. To make a lens that helps with red-green color blindness, the notch filtering occurs primarily in the spectral region corresponding to the maximum overlap between the red and green photopigments. Effectively, this drives a kind of wedge between the L-cone and M-cone signals, thus improving the separation of their signals and providing better color vision to the deficient observer.”
h/t/ Daniel Mack via https://plus.google.com/u/0/115882966144514285637/posts/8WQkxWwJhfk which links to an interesting video of a user being surprised and excited by how effective the lenses are.