Alternative medicine (chiropractic)!!..steemers your thoughts

I keep Watching these Amazing chiropractic stories about people Restoring Their Sense Of smell,taste or even hearing difficulties .
These cases often notes-ed After a fall ,hit on the head or bad posture of the neck or the back. I know that chiropractic deals with bone sublaxation nerves of the spine And nerves in General But These Are cranial Nerves (inside the skull) so I wonder What about vision !!! is it related to posture . Why people When Having Decreased Vision it tends to be one eye weaker Than the other.
Some nice video's from YouTube...