Ben Craven: Colour, the science behind the sence

On Thursday's second D&T lecture the topic was colours and how do we see them. I really liked the lecture and it made me understand and think about senses in general. For me the most interesting part of the lecture was the point when Ben showed us how our brain tricks us on shadows. The example below is an example which we were given, The square with A has a lighter colour than the square B. If you don't believe you can test it with Photoshop. After the lecture I was photoshopping this picture for ages and couldn't believe how I couldn't change the way I saw the colours even though I had evidence in front of me...It made me think what other things I see "wrong" due to my brain. I have been a rationalist for a long time so it was quiet an interesting thing to realise that everything is not seen as it really is. I realised that our brain actually fills up blank spaces  what it can't process which leads to "wrong" visions. I realised as well that colours are seen quiet different with different people, I obviously knew this before but I have never given thought about it especially when I design since I do decisions based on my own senses.