How do an owl’s forward-facing eyes help it judge distance?

Owls possess forward-pointing eyes that provide binocular vision, which allows them to judge distance through a process known as binocular triangulation. Because both eyes are directed forward, they can focus on the same object from slightly different angles, enabling the owl to perceive depth and accurately gauge the distance to its prey.12

While these eyes are rigidly encased in bony tubes and are virtually immobile, owls further enhance their depth perception by moving their heads away from the central plane. This head movement, combined with their specialized eye placement, provides the precise spatial awareness necessary for hunting.21