He discovered differences in grey matter volume, which contains the cell bodies of nerve cells, in two specific locations. (sciencedaily.com)
White matter consists of large bundles of nerve cells that connect different regions of the brain and enable communication between them. (sciencedaily.com)
This is because 40 percent of the nerve fibers in the brain connect to the eye and roughly half of our neural tissue is related to vision. (elearningindustry.com)