In the following site, see what Freya Koss says about paralyses of eye nerve, due to mercury and interaction with EMFs from her computer screen. Furthermore, I know a woman in my neighborhood who, upon extraction of a certain tooth, was able to see normally again (instead of blurry).

http://www.wave-guide.org/archives/emf-l/Mar2000/SV-EMF-and-mercury-toxicity-(Koss)(Kauppi)--.html