You aren’t just your brain. The brain is just the central hub for generating conscious thought. Gathering input from all over your body, but not all.
The body has a lot of other generators doing different things. Such as the lower tract of the spinal chord having a gait generator. Or different reflexes for different purposes.
It isn’t just your consciousness that uses your vision. As much as the brain is a collector, it is also a sharer of information. Heck. There are different circuits that control your eyes too. One is just you choosing to move your eyes. A rigid movement. The other is to track an object witb smooth precision. If you focus on one spot, and move your eyes slightly to the side, you can make these two tracks fight over your eyes. Causing your eyes to tremble very quickly!
Hey. If you can make bank out of it.