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Bats are not as blind as you think: Random trivia

Being an optometrist, I asked myself the next obvious question when I typed out that I was "blind as a bat" without my glasses.  Just how blind is a bat? I found out that I am blinder than a bat.  Bats actually have excellent vision, plus sonar to boot.  I found this cool article here.   I don't have sonar, and I can't even see the big E on an eye chart without my glasses or contacts. You're welcome.  I know your life is more full because of this fun fact. (deviantart.net)