Tips for doing active focus on close ups when playing games

When we play games, we will concentrate on looking at the monitor screen. Is that enough to do active focus? or do we also have to pay attention to the blur?

Just do it, you don’t need to pay attention to the blur.

My tip is picking the appropriate games, like hidden object ones.
E.g: https://nettaigyo.itch.io/heartreasure

I personally have trouble AF while playing action oriented games, I get too involved and forget to relax.