To See You Is To Love You
In the original film, the central protagonist, L.B. Jefferies (played by Jimmy Stewart) is temporarily confined to a wheelchair in his apartment, where he observes his neighbours through the windows in the building across his courtyard.
In To See You Is To Love You, all shots of the view from the window are removed, and the entire film focusses on the gaze and gestures of the actor. Jeffries never leaves the apartment, the audience never leaves Jeffries.