It is the horrifying scene from A Clockwork Orange, where they start Ludovico technique scene on Alex, forcefully clamping his eyes.
How did they shoot that scene? Did they really make Malcolm McDowell sit like that, because it seems painful. Also, it seems, you would have the urge to close eyes for that long time even if it is clamped whereas Malcolm McDowell did not act like wanting to close his eyes.
So, did they really shoot like that or was it some kind of video editing job. The scene feels like very much real though.