There is a cross connection/relationship between the Human Brain and strong part of the body.
1. Human beings are left-handed when the right part of the brain is stronger.
2. Human beings are right-handed when the left part is more stronger comparatively.
Now the question is, what is the relation with the web usability with this Brain Alignment?
When left part of the brain is strong (right-handed people), they are more tend to stick with the left side of the web page. And web usability (along with the page designing) could be of more helpful to convert the visitors into customers.
Research could be conducted mixing the eye-tracker and brain alignment to develop web pages as more powerful tools compared to the other sponsored processes. But a good, well structured online sampling survey and statistical analysis (Regression procedure would be of great help) is what needed.
Jacob Nielson and his team done incredible job in putting the eye tracker and web usability structure to define the most used part of a web page and F-shaped reading nature of a web page. Thanks to them to provide an exposure to that part of the research of WEB.
The above proposition is my brain-child (intuition in fact) and I don’t know such theory at all exists or not. But scope of research is there CERTAINLY.