comparison of rate and progression of myopia among carpet weaver and non-weaver members of the weaver's families in birjand

Background: refractive error is a common abnormality and the most common refractive error is myopia. objectives: the aim of this study was to comparison of rate of myopia among carpet weaver and non-weaver members. methods: in this case- control study, all members of the weavers have been refracted objectively and subjectively by only one person. results: the relative frequency of moderate and severe myopia in carpet weaving significantly more than non-weavers (p < 0.001). the result of variance analysis (anova) showed that by increasing the average duration of employment and working hours daily in carpets, myopia significantly more. conclusions: sustained close distance working could have an effective role in progression and amount of myopia.