Sight test and glasses could dramatically improve the lives of 150 million people with poor vision.
D005139:Eyeglasses / Q000706:statistics & numerical data*; D014943:Global Health; D006801:Humans; D011203:Poverty; D014786:Vision Disorders / Q000175:diagnosis*; D014787:Vision Tests / Q000706:statistics & numerical data*; D014944:World Health Organization