Visual limits of the human brain and the visual processing time is quite evident. This why animals have camouflage skin, humans get headaches at trade shows and why video or game players will be the fighter pilots of the future.

There are many theories and why this is, one good paper on the subject is; modeling visual latencies, masking and synchronization: by G. Bugmann and J. G. Taylor. Some other questions that one would have in reviewing such data would be whether the problem occurs at the eye or within the brain. Or is there a problem with the communication between the two or is there so much information involved in interpreting the data while the eye is focusing on the objects definition and determining it