With their eyes and brain of course!
It doesn't mean it's going to perfectly mathematically accurate but if they see prey in the distance or prey up close they can tell the difference!
Binocular vision helps us to judge distance and depth more accurately.
The phenomenon due to which we can judge
cover one eye and you will your lose depth perception. so, with two eyes you can judge the distance of an object but only within a metre or so because of the relative position of the eyes to the object yeeeaaah.
Depth constancy refers to the ability of our visual system to perceive objects as maintaining a consistent depth regardless of changes in the viewing angle or distance. This phenomenon allows us to perceive objects with the correct depth relationships even as they move relative to our point of view.
you can judge distance better with two eyes. that's because you need two eyes to guage depth perception. so , when one of your eye is closed, you can see much than you see with both or your eyes.^^ hope this hepled~ Lol, if it helped, add me in facebook~>< thanks~:D
The depth of a lake at a center point is a function of the distance of that point from shore.
Depth is a measure of distance between the surface and the ocean floor.
Depth of field in reference to eyeglasses is the preferred reading distance and its smaller surrounding area. This is the distance used for single vision readers.
Binocular stereoscopic vision allows primates to perceive depth and distance accurately, which is essential for tasks such as navigating through the environment, hunting, and identifying potential threats. This type of vision also enhances hand-eye coordination, facilitates object manipulation, and aids in social interactions through recognizing facial expressions and gestures.
braking system of gantry system
Opposable thumbs, depth perception, peripheral vision, and limbs.
Because it is small. Harder to judge the speed and distance of a small object.