Background and Aim: Myopia is one of the most prevalent complaints of patients referring to ophthalmologists. Regarding the progressive nature of this complication, it was decided to assess the patients referring to the eye clinic of Valieasr hospital in Birjand (in 2012).

Materials and Methods: In this cross- sectional survey,with simple non-probable sampling, a total of 403 myopic patients who had referred to the eye clinic of Valieasr hospital in Birjand in 2012 were celected.

Data collection tool included a researcher-designed checklist has been compeleted by the optometrist.

Increase of 0.5 diopter was accounted as the progression of myopia. After the questionaires were filled out, the obtained data was fed into SPSS software (V:16) and finally analyzed by Chi-square.

Results: The present study revealed progression of myopia in 47. 4% of cases in right eye and 47.6% in left  eye. progression of myopia had also a significant relationship with variables of age and hours of study in a day in both of the eyes and with variables of sex and number of hours wearing medical glasses in one eye.

Conclusion: It was found that progression of myopia had a significant relationship with variables sex, age, hours of study and hours of wearing medical glasses. Thus, controlling these variables can have both a preventive and curing role for the patients and those prone to the disease.