Guys, this is a well known and under utilized effect of human psycho physiology. Visually focusing on a single point, small object, or just small visual field (aka tunnel vision) increases mental focus.
AFAIK it’s also one of the reasons we all get “glued” to smartphone screens.
AFAIK it’s also one of the reasons we all get “glued” to smartphone screens.
In this paper, more than 20 deg visual field for a screen and subject performance went down: https://www.sciencedirect.com/science/article/abs/pii/S01678...