Why do you sway more with your eyes closed?

When you close your eyes, you're reducing the visual input that helps your brain maintain balance and spatial orientation. The body relies on a combination of visual, vestibular (inner ear), and proprioceptive (body position) information to stay balanced. Without visual cues, the brain relies more heavily on the other senses, which can lead to increased swaying as it struggles to accurately interpret body position and movement. This phenomenon highlights the critical role vision plays in maintaining stability.