nanovision in crysis 2 was not eye friendly. im sure many people got blurry eyes, headache etc from crysis 2 nanovision if u used it long enough.

sadly nanovision in crysis 3 isn't any better, im not some eye specialist but im 99% sure that its bad for the eyes. i doubt full release will have clear(more eye friendly) nanovision but hopefully they'll fix it with patch etc?

most people i know used clear nanovision for crysis 2:
edit C:\Users/xxx/Saved Games/Crysis2/game.cfg
r_NightVisionBrightLevel = 0
r_NightVisionCamMovNoiseAmount = 0
r_NightVisionCamMovNoiseBlendSpeed = 0

i think its stupid cos nobody wants to fk up their eyes by playing some stupid video game. even diablo 3 had really fked up red blurry death screen but they finally fixed it after few patches..