Perhaps some that are truly toxic and wear glasses are in actual fact compensating for the effects of mercury or at least "some" of the effects perhaps.

Many people in my family wear glasses and dont seem toxic, yet I have never worn them and been toxic most of my life....When the visual problems occured, it was at the sametime I got ill so I knew something was related to that, which is why I did not get glasses. Even an eye specialist did not tell me to get glasses, though I had blurred vision. He was quite bewildered and felt there was something else amiss, rather than "true faulty vision".

I'm sure most would have gotten me in glasses fast, but he did not. I remember my vision got so bad that I was unable to see street signs properly and often people's faces were slightly blurred. If I was looking down at something and then looked up, I could not re-focus properly again at any distant objects.