patrace:
I feel like a good Boing Boing article would dip into how these expensive glasses work and then tell you how to make your own pair for five bucks using common household items.
If I understand properly, they work by filtering out wavelengths where color impaired people see an overlap between what we consider discrete colors. This leaves a distinct color on either side of the confused area which is now easy for these people to see clearly (Color, please be gentle on me if I have screwed it up)
It might barely be possible to do a crude imitation of this at home by using theatrical lighting gels.
It is possible to use those gels to make goggles that will push your vision right out to the red/infrared edge of the spectrum
