Hello and thank you for your question.
This is not true. Your nerves for vision are distant, encased in bone and not associated with your teeth. I have not heard of anyone becoming blind after an extraction of a tooth unless an instrument was dropped into the eyeball of the patient. Even so I still have not heard of a case such as this, but I'm sure it has happened. We have our patients wear eye protection at all times. In our consent forms if this was a risk we would have it in there. I have not seen a single form with risk of eye damage.
may occur if you get an infection in the socket, don't come in for treatment and acquire orbital cellulitis
which can lead to blindness.
I think you can rest easy knowing you won't go blind getting your teeth extracted.
Remember the saying "Don't believe everything you see on the internet" - Abraham Lincoln.