Goose Eyesight

My new gander has pale blue eyes and I actually wondered about his eyesight, a bit worried that he might be blind. But he sees like any other goose. He watches things that are 100's of feet away, doesn't miss a thing, and notices fine detail.

So it got me wondering. I wonder if geese have excellent eyesight because they are an extremely high flying bird. OK, mine don't fly, but in nature; the geese who are their ancestors are high flyers. There would be an advantage to be able to see the ground and what was there from high in the sky, so nature would have favored the best eyesight.