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Find in the picture all the numbers from 1 to 90.

Here is a test to verify the observation. Mission: to figure all the numbers from 1 to 90. It's not as easy as it seems. The test can take place several times. A second attempt usually lasts as much as the first, - the amount of information is so great that the memory is unable to hold it even for such a short time, and those numbers, the location of which seemed to be stuck in my memory, suddenly "disappear" again from the table and you have to find them again.

Only after long training, developing peripheral vision and the ability to cover a large area watchful eye by accelerating the search eye movement, it manages to reduce the time to a few minutes.