I work at a facility where there are many dyslexic people and I've done quite a bit of research, but have failed to find any really solid evidence that it reall

I work at a facility where there are many dyslexic people and I've done quite a bit of research, but have failed to find any really solid evidence that it really works. The people I work with seem fairly lack-lustre about it. I'd welcome any proper independent verification of its utility.