I know at least some departments have vision standards. I was born with a cataract and the lens was removed, so without my contact lens in my left eye, I'm legally blind and not sure I even cut 20/100 vision without it in. With it, I'm probably close to 20/20. My right eye is completely perfect on the other hand with no issues.
Read more: Can I be legally blind (un corrected) in my left eye and still be a cop?