None of the 1,100 bat species are blind. Most bats have eyesight that is just as good as humans. Bats are sensitive to changing light levels and see in color, just like humans.
Bats are nocturnal mammals and do most of their hunting at night, so they use echolocation to locate prey in the dark. Echolocation is the process of using high-pitched sonar signals that bounce off objects and report auditory information back to the bat's brain, which translates the signal in a visual map. This allows bats to avoid objects in their paths and navigate without trouble and locate prey.