Have you ever been to a place that has many things of interest but you realise you couldn’t keep your eye on one particular item or part of the space? If yes, it is a normal thing.
The development of a focal point is a natural result of the way the human eye sees. Every picture we see usually has a point of emphasis, a focal point that naturally draws the eye.
When we are looking at a particular object, that object is said to be in sharp focus, implying that other areas and objects around that major object may appear a bit blurred or out of focus.