For me to do it for long periods of time in high fidelity, I need to either close my eyes or do this blurring/out of focus thing I don't know how to describe. S

For me to do it for long periods of time in high fidelity, I need to either close my eyes or do this blurring/out of focus thing I don't know how to describe. So in a sense, it does have to replace my vision literally. I regularly lead high level strategy meetings with my eyes fully closed so I can use my memory and imagination fully, I've seen other people do this also so I presume I'm not alone.