Designers should know that we humans habitually scan our surroundings. We may focus on one small area or item for a time, but when we change our field of vision, we first begin to visually “consume” that new view by performing a quick scan. In doing this, we unconsciously look for elements of contrast, things that stand out from the forest of mundane elements, as part of our instinctive threat-detection process.
I'd like to read up more on that initial scan, but I can't find an established term for it. And searching for "initial scan" or "quick scan" gives results from all over the place.
Is there an established term for this behaviour?