Subjective symptoms ( mean Ocular Surface Disease Index , @ @ to @ @ ; P = @ , mean Standard Patient Evaluation of Eye Dryness @ @ to @ @ ; P = @ ) , lipid layer thickness ( @ @ to @ @ ; P = @ ) , number of expressible glands ( @ @ to @ @ ; P < @ ) , lid margin parallel conjunctival folds ( @ @ to @ @ ; P = @ ) , and bulbar redness ( @ @ to @ @ ; P = @ ) were all improved @ months after treatment .