Every teenage boy throughout the ages has heard the old accolade of "You'll go blind!", most likely from his mother at some point in time.
However, there is not one documented incidence of man, nor boy, having ever permanently lost his vision for failure to heed his mother's repeated warnings.
You may ask yourself, "Why on earth would a mother make up such an atrocious lie to scare her offspring away from such behavior?". After all, mother's are supposed to be nurturing, loving caretakers put in place to guide their children through the process of learning, growth and maturity.
As a mother, I am here to give you the honest to God, bottom line answer to that question and to eradicate any confusion on the topic of if this act of self can actually endanger your vision.
And that answer is
Your Mother wasn't trying to outright lie to you. It's just that "You'll Shoot Your Eye Out!" was already taken.