Filling in the gaps

As the kit might not have arrived, here's another bit of the vision project we should try an investigate... When we dissected the eyes, we saw where the optic nerve comes in - thats going to take up a bit of the retina kind of near the middle, but we don't see a hole in our view where the retina doesn't have space for photo-receptor cells. This is the 'blind spot', but it doesn't seem like we are blind there... We know that our brain does quite a lot of processing from the optical illusions we looked at at the start, and our brain helps here by filling in the missing part of the picture! How good is the brain?

Here is a simple test to measure where our blind spot is...

If you follow the link there are a series of additional test cards that show how good our brain is at making up missing data! We can make our own tests and see what our brain can fill in!