A lot is written these days about design, marketing & creativity etc. However it is quite amazing (to me anyway) that no one ever seems to comment about the limitations of the equipment that we all have. I'm not talking about your computer here, but your eyes, your brain and your vision.
The eye is a wonderful thing, but without our brilliant brain and the interpretive process, it would be little more than a camera, albeit a very sophisticated one. The eye though has limitations and these are often forgotten about (or not even known) by designers.