Vision care in Third World nations.
D001766:Blindness / Q000453:epidemiology; D003695:Delivery of Health Care; D003906:Developing Countries; D005139:Eyeglasses; D006280:Health Workforce; D006801:Humans; D009907:Optometry / Q000379:methods*; D010349:Patient Compliance; D010353:Patient Education as Topic; D014786:Vision Disorders / Q000628:therapy