What makes and eagle see small prey from far above?

Their Eyes: Eagle's eyes have a higher density of photoreceptor cells than humans. This means they are incredibly adept at detecting finer detail from great distances. Additionally, their eyes have two foveae- a small area within the eye responsible for sharp central vision. This allows them to focus on targets directly ahead of them with the rest of their vision providing peripheral coverage.

Magnification: The shape of the eagle's eye naturally provides a telescopic magnification. This is due to the combination of a relatively large cornea and a massive, bulb-like lens inside the eye. This combination creates high magnification, allowing them to see great distances.

Vision Spectrum: Eagles can see a wider range of the light spectrum than humans, including ultraviolet light. This allows them to detect subtle differences in colors and patterns, particularly in prey animals that might not be as noticeable to humans.