Most bats do have bad eyesight, but they are definitely not blind.In laboratory tests, bats have been shown to be able to distinguish shapes and colors. The main reason that people think bats are blind is that they hunt at night and they use a form of sonar to find their way and their prey. This is not unlike dolphins who use echolocation to hunt, especially in the murky depths. Just as the dolphin is not blind, neither is the bat.
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