Sign sign everywhere a sign

Sign seen outside a Lasik Surgury Center (I may or may not have put it there)

"Do not look into laser with remaining eye"

By the way, I absolutely hate the word 'sign'. Its spelling is repulsive. What's wrong with the trigonmetric function spelling? Sine... Sure, it implies mathematics. Sure, it invokes fear into the hearts of the masses, but what the heck am I here for if not to confuse and obfuscate?