Is A Bat Really Blind?

The saying, you're as blind as a bat is just that, a saying based on the belief that a bat is blind. How anyone came to this conclusion is a mystery, as bats are nocturnal creatures that remain awake in the night. All bat species have eyes and most have excellent vision. The Megachiroptera or "Old World" fruit bats rely totally on their eyesight to find food. Bats that hunt moving prey at night usually rely on their echolocation abilities but they still can see.
There are more than 1100 species of bats in the world. Of these, about 200 are Megachiroptera and use their eyesight for hunting their food.  Among these species are the large Old World "flying fox" bat from Africa, Asia and the South Pacific. The remaining 900+ species are the Microchiroptera which are found worldwide except in the most extreme climates. Bats eat a wide variety of things. Most eat some kind of insect or other invertebrate. Some eat larger prey such as small mice, lizards and even other bats. Some eat only fruit and pollen. A few species have become very specialized such as the fish-eating bat and the frog-eating bat. Probably the most specialized of all are the three species of true vampire bats that eat only blood ~ but not human I hasten to add!

No, not exactly but they use sonar for comm.