Well, bats has eyes, but they are blind. Bats can catch they're food by ultrasounds. His prey issues an ultrasound when he moves or something like that. And ultrasound leads him to his prey. And when he finds him. He eats it.
Most bats catch prey using ears they send out a high frequency sound which is above the human hearing range, and this sound echos off of their surroundings. Their ears catch echoes and then they process the echos and get a general idea about surroundings.
Bats emit a high frequency noise, too high for us to hear, that noise works like radar, the noise bounces off objects and comes back to the bat, letting it know where the thing is, the closer the object, the faster the sound comes back
i've always been mystified by bats being blind and how they can pick up echos off their surroundings when hunting for food. especially how they can distinguish the difference between something non-edible blowing in the wind and actual prey. it must be a very fine-tuned sonar system that they have.
First of all, bats have eyes. Second of all, they aren't blind. That is a common myth. Bats just can't see very well, but they CAN see. They catch their food by using echolocation, which is when they make a high pitched noise that bounces off of objects telling the bat where it is.