Humans who notice their surroundings are often said to have eagle eyes because eagle eyes have retinas that are more densely coated with light-detecting cells called cones than human retinas, enhancing their power to resolve fine details. Second, they have a much deeper fovea, a cone-rich structure in the backs of the eyes of both humans and eagles that detects light from the center of our visual field. 

In general, eagles themselves are quite remarquable when talking about their vision. They fly around for hours, hundreds of feet above the ground hunting for prey. Even while flying, they notice every detail. They might notice a fish swimming in water or a prey in the forest. These eagles are famous for their keen vision. They have this exceptional vision 

Some humans are the same. Everywhere they walk, they might notice the smallest detail just like eagles when they fly.