The disease that Aamir Khan's character, Sanjay Singhania, suffers from in the movie Ghajini is anterograde amnesia.
Anterograde amnesia is a type of memory loss that affects the ability to form new memories. Individuals with this condition can remember events that occurred before the onset of amnesia, but they struggle to create new memories after the injury or illness.
In the movie, Sanjay Singhania develops anterograde amnesia after a brutal attack, causing him to lose his short-term memory. He uses tattoos and other visual cues to remind himself of his past and the people he needs to find.
The movie, while fictional, provides a glimpse into the challenges faced by individuals with anterograde amnesia. It highlights their struggle to navigate daily life and their constant battle against memory loss.