Why can't we walk straight with our eyes closed?

In the studies carried out on the subject until today, it is seen that those who think that they are walking straight with their eyes closed actually move by drawing circles. According to the estimates of some researchers, this is because there is a deviation in our cognitive perception of our definition of “flat” in each step as we walk, and these deviations are added on top of each other, causing the line to progressively curl.

The exact mechanism in our body is not known to cause this deviation, but according to the experts' estimation, the vestibular system that manages our spatial perception and balance skills and the proprioceptive system that helps us understand the position of our body and the parts that make up our body (arms, legs, head) work together to understand our position and allows us to update it regularly. In the absence of visual cues, the vestibular system in the inner ear is thought to fail, and this is misleading about our position.