Myopia is a refractive disorder of the eye that is becoming increasingly prevalent throughout the world. In 2000, it was estimated that 1.406 billion people in the world (22.9% of the world population) had myopia, of which 163 million people (2.7% of the world population; uncertainty interval, 932–1932 million [15.2%–31.5%]), had high myopia (more than -6.0D). By 2010, the estimate increased to 1950 million (28.3% of the global population; 1422–2543 million [20.6%–36.9%]). Myopia has been predicted to increase to 4758 million people worldwide by 2050 (49.8%). This will have a diverse impact on the social, economic, and health care systems globally.