Objective To examine the prevalence and heritability of myopia among Uygur and Han students in Urumqi city of Xinjiang Uygur Autonomous Region( Xinjiang). Methods By using cluster sampling,2 380 Uygur and Han students were selected from middle schools in Urumqi city of Xinjiang and a questionnaire survey and myopia screening were conducted among the students. The heritability of myopia for first- and second-degree relatives among the students was calculated with Falconer method. Results The overall prevalen...