Scientific disciple of magical art - depends how you look at it really
Folk magic is more of a magical tradition than a school of scholarly research being as old as the hills, some say as old as time itself. It is as deeply ingrained to the psyche of the country folk as the changing of the seasons and has been passed down from father to son and mother to daughter for countless generations.
A village where everyone goes blind sometime during puberty. What could be causing this? Perhaps something in their diet. Or some malignant gene. How would an entire village where only young childen can see function?