The plot of Andhadhun revolves around a pianist who pretends to be blind to 'fine tune' his artistic sensibilities until a twist of fate lands him bang in the middle of a murder investigation. The film flows pretty smoothly until the last bit, which is left open-ended for the audience to interpret.
Now, let's fast forward to Andhadhun's climax: where an apparently blind Ayushmann Khurrana kicks a can out of his way with his support cane (which has a rabbit carved on the handle) is perhaps one of the most significant aspects in the entire movie. This is when you, as a viewer, realise that he isn't blind after all. But when did he get his vision back?
If you analyse the events that lead up to the climax of Andhadhun, here's what you'll find: Simi (Tabu's) car is about to ram into Akash (Ayushmann Khurrana). But the vehicle swerves away from the road and blows up because a rabbit hits the windshield while it's trying to dodge a hunter's bullet. You'd automatically connect the handle of Akash's support cane which, has a prominent rabbit - presumably as a metaphor for the same one that saved his life. Or so you think.