Kickstart70- This isn't meant to be a spy tool. I think everything looks pretty dim when you are wearing it.

Wiley - damage to the brain will not change the spectral response of the eye. Damage to the cornea, such as cataract surgery, will. After cataract surgery you can see further into the ultraviolet. The human cornea is specifically designed to keep UV out of your eye, where it could damage things.

Maf - Our vision works pretty good, but in some ways it is a kind of patched together system. there is variability in the pigments we have in the human eye. The spectral response of the individual photopigments is usually shown as being a bell curve. This project is designed to cut out everything but the extreme long wave fringe of your vision. What if we did have a tiny bit of visual IR sensitivity? If no one is checking, how would we know?

I have purchased a pair of goggles and have the Lee filters on order. It could be pure bunk, but by next week sometime I will know for myself.