Gellert Grindelwald is a fictional character in the Harry Potter universe, created by author J.K. Rowling. He is a powerful and dangerous wizard who sought to establish a new world order in which wizards would rule over Muggles (non-magical people). He was also a former friend and close associate of Albus Dumbledore, who eventually defeated him in a legendary duel.
Grindelwald is described as having a “peculiarly penetrating” gaze, but there is no specific mention of him having a unique eye. However, in the Fantastic Beasts film series, which is set before the events of the Harry Potter books, Grindelwald is portrayed by actor Johnny Depp with a distinctive appearance, including a prosthetic eye.
In the second Fantastic Beasts film, “The Crimes of Grindelwald,” it is revealed that Grindelwald’s eye was damaged during a confrontation with Dumbledore, his former friend and ally.
The exact details of this confrontation are not yet known, but it is hinted that Dumbledore may have been responsible for injuring Grindelwald’s eye.
It is worth noting that the Fantastic Beasts film series is separate from the Harry Potter books and films, and there may be differences between the two in terms of continuity and details.
Additionally, the film series is still ongoing, so more information about Grindelwald and his eye may be revealed in future installments.