Introduction: Myopia of eyes characterized by a limited vision of remote objects while nearby objects appear in focus. It is the most common refractive error attacking (1). Several studies have revealed that increasing t prevalence of myopia over the past few decades, reaching up to 80% in some populations. (2,3). Objective: The primary objective of this study was to measure the prevalence of myopia among senior medical students, and the secondary objective was to identify any relationship between different types of study electronic and non- electronic methods used by students. Methods: An analytic cross-sectional study conducted at King Abdul-Aziz University in 2015. A two-staged sampling technique. A questionnaire was constructed with Questions included measuring risk factors for myopia. Results: Out of 240, 76%were females and 24% were males. Prevalence of myopia was 19%. 34% complained of a progressive worsening of their symptoms. (74%) had a first degree relative with myopia. 37% of the myopic students complained of headaches after reading. The correlation between myopia and non-electronic type of study was significant (p-value .027). And with electronic (p-value.175) Conclusion: The results of this study indicate progression of myopia during medical school was very significant: chi- square test =36.06 (p-value .000). And suggest an association between the types of study and the progression of their eye diseases.