When a film image opens or closes through a circular area, the changing boundary becomes part of what we watch. Notice which detail remains visible as the surrounding picture disappears.
Follow the narrowing area
Choose an example you can revisit and note where the circle is centred. Does it stay on a face, an object, or an apparently empty part of the setting? Watch whether the subject moves while the visible area changes.
For an imagined scene, picture a crowded room closing down to a forgotten hat. The final emphasis differs from a circle centred on the person leaving. This is a viewing exercise, not a rule that a hat must symbolise any particular feeling.
Compare the opening and the closing
If the film uses the transition again, consider what the first visible detail asks you to anticipate. You may recognise a location from a small clue before the wider image confirms it.
Write down the last detail seen, the first detail revealed, and your expectation between them. Keep the transition’s visible structure separate from assumptions about its historical meaning. A shrinking or expanding boundary can guide attention even when there is no need to identify a reference to another film.