They read differently, I would imagine.
But to exploit that for reading research, subjects who were born with only one working eye would be required — how rare are they?
A significant number of people lose the sight of one eye and continue to read (and even make typefaces, in the case of Fred Goudy), but they have learned to read with both eyes, complicating theory.
Captured from web.archive.org on 25 Oct 2008. view this capture