What does it mean when scientists say “an eagle can see a rabbit in a field from a mile away”. Is their vision automatically more zoomed in? Do they have better than 20/20 vision? Is their vision just clearer?

Question

What does it mean when scientists say “an eagle can see a rabbit in a field from a mile away”. Is their vision automatically more zoomed in? Do they have better than 20/20 vision? Is their vision just clearer?

In: Biology

Answer 1

They have better than 20/20 vision. In fact they have 20/5 vision.

 I can’t find a figure for their field of view (how “zoomed” their eyes are) but it sounds like they have good peripheral vision so it’s probably no more zoomed than our eyes, just sharper.