They need it as they are predators (minute ones if that) of insect so use their monocular vision to scope out food. Also they need it to search for predators or any other threats so they can make a quick escape.
monocular
Any animal whose eyes are on the sides of its head, is considered to have monocular vision. They can't see directly in front of them. Humans aren't monocular - we are BINOCULAR. Other animals, such as fish, birds (except owl) , lizard, rabbit, horse, deer are MONOCULAR.
you
Monocular ,
Stereoscopic vision
monocular
Monocular vision is not a disorder or condition. Monocular vision is the type of vision a horse, cow has in that they see from one eye at a time because their eyes are on the sides of their face. Humans are binocular because we see in the front.
stereoscopic
There is a variety of things that suck if you have monocular vision as I have monocular vision. Things like lack of depth perception, unable to join the military forces or air force, and people annoying you saying YOU NEED TO PROTECT YOUR GOOD EYE! One good thing that comes from it is being able to shoot better than anyone with two eyes, and having more accuracy on one target as it is quicker for monocular persons to focus with one eye than a binocular person having to close one eye.
you. Monocular vision is something you can see with only one eye. You only have a little, but you still have some. Mostly you have binocular vision (seeing something with two eyes) but one eye is always seeing something that the other cannot.
It's a African impalla
A night vision monocular is typically used for enhancing visibility and observing objects or activities in low-light or dark environments, providing clearer vision and the ability to see in the dark with the assistance of infrared technology.