Has anyone taken the Visual Contrast Sensitivity (VCS) Test, which is said to be an easy and simple measure of biotoxins in your body? One such VCS test is provided by Dr Shoemaker for $15. Some free Visual Contrast Sensitivity Tests are found here: http://www.psych.nyu.edu/pelli/pellirobson/ http://www7.bpe.es.osaka-u.ac.jp/ohzawa-lab/izumi/CSF/A_JG_RobsonCSFchart.html When I view this free VCS Chart on my computer screen, I cannot easily make out the last line of letters (the eighth line). But I expect the result you get depends on how your computer monitor is setup. Anyone else care to have a go at reading this VCS chart?