Related to aiming, sighting, alignment and the difficulties with accurate perception and trusting your eyes.
Here is an online test about the senses. A few of the early tests provide good examples of why we can't always trust our eyes.
http://www.bbc.co.uk/science/humanbody/body/interactives/senseschallenge/
Here is an online test about the senses. A few of the early tests provide good examples of why we can't always trust our eyes.
http://www.bbc.co.uk/science/humanbody/body/interactives/senseschallenge/