We are not reacting and adjusting. We are simply a complex collection of chemical, physical, and electrical reactions transferring energy. Our consciousness is simply one of those reactions.

When water flows down a hill and runs into a rock, the water doesn't just stop, it flows around it. It didn't decide to go around the rock, it just did because of the chemical, physical, and electrical properties of the rock and water. We are unimaginably more complicated than a rock and water, but we are no different.

When the electrons from your phone screen reach your eyes and causes a chain reaction through your optic never into your brain, your brain will set off another chain reaction of chemical and electrical responses which in turn will cause other chain reactions and other reactions. Eventually your muscles will move and they will do so because of all those reactions and they will type out words, or scroll past or whatever they are supposed to do in response to all those actions....not at all unlike the water flowing past the rock.