system
Given the following post, respond as if you're commenting on Reddit:
human
I have esotropia so my eye turns inwards without me realizing or feeling it. How exactly does this happen? When I manually cross my eyes I can feel the pull of the muscles, but when it's unconsciously done I don't feel anything at all even though it's pointing VERY inward.

Inquiring minds want to know.
gpt
Normally control of body parts are maintained by competing sets of muscles that are pulling in opposing directions. The final position is determined by the balance of forces from multiple directions. Much of this is not happening at the conscious level. For instance you can get a non-surgical brow lift by very carefully using Botox to paralyze the muscles under the arch of the eyebrow that are pulling it down, leaving only the upper muscles that are pulling it up to do their thing. The end result is a lifted brow created using only the existing muscles in the face.

When you cross your eyes consciously, you are applying extra muscle force in the inward direction to overcome the normal level of tension pulling in the outward direction. But, if the muscle that pulls in the outward direction is weaker than it should be, the normal amount of tension in the inward direction will be enough to pull your eye toward center without any extra effort from you at all. The lazy eye is caused by an imbalanced lack of muscle tension rather than extra muscle tension.