Sctoma's

I have in my eye a thing called a sctoma - it is a blind spot that means I cant see a certain spot. You should have one too (although not as obvious as mine) but it is pretty hard to see where it is because your brain tricks you into not noticing it.

But far worse than that is the blind spot that we have in our minds. as with me and other people it is often in different places and it can be large or small, the brain can fill it in with something sensible or with nothing or with somthing ridiculous.

Just think - there is always somthing right infront of your face that you can't see. I'm lucky - I can't see it - but I know where it is.