To maintain balance, the human body relies on three different systems. Most people automatically think of the inner ear, which is one of them, but we also depend on our muscle/joint system and our eyes. If any one of them is not functioning properly, our balance/proprioception will suffer. read more
When we close our eyes, we lose this information and must rely on the remaining systems, most notably the vestibular system. If we are not accustomed to using our vestibular system as a primary input for balance maintenance, we may stumble when we close our eyes. read more
It's very impractical because moving a page full of words will make your eyes lose fixation. You can find apps that do this on your phone/tablet. Fatigue is the issue in that case. read more
Balance and eyes: There are 3 systems that provide our brain with information in order to keep our balance: inner ear, vision, and sensation from our feet. A person needs two of the three to be working well to keep balance. read more