Oculus (2013) is a supernatural horror film directed by Mike Flanagan. The film stars Karen Gillan, Brenton Thwaites, Rory Cochrane, and Katee Sackhoff.

The story revolves around the Russell family and a haunted mirror that has caused tragedy and terror throughout their lives. The plot unfolds in two timelines: the past, depicting the events that led to the tragic death of the family patriarch (Rory Cochrane), and the present, focusing on the surviving siblings, Kaylie (Karen Gillan) and Tim (Brenton Thwaites).

In the present, Kaylie, who has grown obsessed with the mirror, believes that it is responsible for the supernatural occurrences and the violent deaths of their parents. She convinces Tim to help her with an elaborate plan to prove that the mirror is cursed and to destroy it. As they try to uncover the truth, they are drawn into a nightmarish cycle of psychological horror and disturbing visions that blur the line between reality and hallucination.

Oculus is known for its unsettling atmosphere, intricate plot, and psychological depth. The film explores themes of trauma, memory, and the impact of unresolved family issues. It received praise for its originality, effective scares, and strong performances, particularly from Gillan and Thwaites. The film has been well-regarded for its smart and inventive approach to the horror genre.