comparison of two marketed hydroxypropyl methylcellulose based artificial tear drops in young patients with dry eye syndrome

background: artificial tears have been among the first line of therapy in management of dry eye syndrome (des). this study was conducted to compare a local artificial tear with an imported one in reduction of des. this comparison would help to evaluate the cost and benefits of each drop in the proper management of des. m aterials and methods: in this double-blind randomized clinical trial study, a total 65 students meeting our inclusion criteria for des entered the study. the osdi questionnaire, tbut, corneal and conjunctival staining and schirmer test, were performed. the patients were divided into two groups by block randomization. group 1 received first drop and group 2 received second drop. both groups were instructed to use the drops 4 times a day for 14 days. the same tests were performed by the same examiner who was blind to the treatment type after two weeks. repeated measured anova was used to analyze the data. r es ults: a total of 58 patients completed the study. in both groups, after the intervention, the osdi scores (p<0.001), tbut score (p=0.041), corneal (p<0.001) and conjunctival staining scores (p<0.001) showed improvement in compare to those before the intervention. however, the schirmer test score did not show significantly difference before and after intervention. in comparing two groups the osdi scores, the tbut score, the corneal and conjunctival staining scores and the schirmer scores did not show statistically significant difference. conclusion : the two artificial tears equally reduced the symptoms and signs of des in two weeks .