Warner Bros. is being sued by an angry mom who claims a 'Harry Potter' replica wand seriously injured her toddler's eye ... and she wants a huge check to cover the damages.
According to the lawsuit, obtained by TMZ, Jessica Perry says she bought a 'Potter' replica wand with a light-up pen function from a store and gave it to her kids ... only for it to end up impaling her 3-year-old's eye.
Jessica claims her older son was waving the wand around -- like wizards do in the movies and books -- when the metal writing portion of the pen ejected from the wand, flew across the room and pierced her younger son's eye.
In the docs, she says the pen ruptured his eyeball, nearly leaving him blind and forcing him to undergo a pair of eye surgeries.
She alleges the wand was defective, and Warner Bros. should have known about the risks ... because she says there's at least one online review describing a similar incident.
In the suit, Jessica claims her son had to use painful eyedrops which made him scream in agony ... and she says the eyepatch he had to wear frightened him so much, he could only sleep with his bedroom lights on.