Hi, ive noticed a lot of talk on different threads recently about brain problems leading to sensory gating deficit (inability to filter out unecesessary external stimuli) and visual problems and i notice that its not often talked about in its own right. The thread on the Herv -w reactivated endogenous retrovirus got me hooked on thinking about this issue. I have a number of visual issues, most notably blurred vision not corrected by glasses as well as severe eye pain, eye droop etc. Dr Myhill explains this as being attributed to mito dysfunction - the eyes have a high need for ATP and will be one of the first parts of the body to go if we push (along with the brain which cant recycle energy the way the rest of the body does. The other issue is what i want to discuss here and i am very interested to see if anyone else feels this way. I have a general feeling of unreality which is more pronounced when i am outside - even if it is not noisy, but the main issue is that when i walk the movement of the things around me as my eyes and body go up and down is very hard to tolerate. I know that sounds nuts so i asked some friends if they noticed the up and down movement of the trees, buildings, floor etc when they walked and they all said no. I have tried very hard to not notice it, and mainly my brain seems to filter it out well enough for me to cope, but other times it is so marked i feel it makes me very disorientated and woozy. Any one else? Is this what they mean by sensory gating deficit? All the best, Justy.