If Eagle vision comes to humans ?

If you swapped your eyes for an eagle's, you could see an ant crawling on the ground from the roof of a 10-story building. You could make out the expressions on basketball players' faces from the worst seats in the arena. Objects directly in your line of sight would appear magnified, and everything would be brilliantly colored, rendered in an inconceivable array of shades.

The more scientists learn about eagle vision, the more awesome it sounds. Thanks to developing technologies, some aspects of their eyesight may eventually be achievable for humans. Others, we can only imagine.

Eagles and other birds of prey can see four to five times farther than the average human can, meaning they have 20/5 or 20/4 vision under ideal viewing conditions. Scientists have to cook up special experiments to judge eagles' eyesight — your optometrist's alphabet eye charts are of no use, after all — and one common setup involves training the birds to fly down a long tunnel toward two TV screens. One screen displays a striped pattern, and the birds get a treat when they land on it. Scientists test their acuity by varying the width of the stripes and determining from what distance the eagles begin to veer in the correct direction.