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
People can have better than 20/20 vision, this is just a metric that has been deemed to be good vision, it is not the maximum a person can see and it’s not even an indication of perfect vision. They don’t go any further because generally there just isn’t a need for it.
It just means you can see clearly from 20 feet away.
There are also a number of other areas of our vision that make up ‘perfect vision’ and these are not even considered in a 20/20 test.
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