Question: how does the brain put are eye sight together

Ian van der Linde answered on 14 Jun 2011:

That’s a tough question! There are more than 30 different parts of the brain that are involved in vision, all with different tasks to perform. In your eye is a set of sensors, a bit like the photodiodes you’d find in a digital camera – these sample the light, and it gets crossed over in the centre of your head so that both left sides end up on the right side of the head, and both right sides end up on the left side of the head. This is so the input from the two eyes can be compared so that we can measure how far away things are (called stereopsis). There are other parts of the brain, towards the back of your head and branching out across the top and bottom, involved in putting together shapes, measuring the angles of lines, recognising faces, measuring speed of moving objects, and choosing where to move the eyes. These are all connected together in a big network, with the outputs of one stage feeding the inputs of other stages. Hope this gives you a little insight into the organisation of the visual system in the brain, but there is a lot more to it!