Stye is infection of Moll & zeis gland present in every body eye lids.Stye occurs due to refractive error as book says but practically it doesn't happen & I have seen happening in persons who have no refractive error,there is no cure for recurrent& multiple styes ,we only prescribe antibiotic orally as well as for local application in form of ointment. Hot fomentation does only help to certain extent& for for recurrent  chalazion we need surgery again & again. There is good medicine in homoeopath for recurrent & multiple stye as I had read during my post graduation in a book written by renowned professor of ophalmology of Mumbai, who is no more (Dr muskaty) the drugs named were pulstilla & silicea