The industry spread to include the use of Botox, derived from the deadly botulinum toxin and originally intended to treat muscle disorders.

What Happened: the couple were using small doses of a deadly toxin to treat "crossed eyes" eyelid spasms and other eye-muscle disorders when they noticed an interesting side effect.

What Happened: The couple were using small doses of a deadly toxin to treat "crossed eyes" eyelid spasms and other eye-muscle disorders when they noticed an interesting side effect。