Imagine sitting in a classroom and not being able to see a picture that your teacher is showing. Imagine driving a car, not knowing that your vision is so bad, that driving is dangerous to you and others. For millions of people, that condition is normal. That is because there are not enough eye specialists, known as optometrists, to diagnose and treat eyesight problems in many poor nations. In some developing countries, there is only one optometrist for every eight million people. That estimate comes from J. Kevin White. He started the group Global Vision 2020. He also is its executive director. Global Vision 2020 is a charity based in Maryland that is working to bring eye tests and low-cost eyeglasses to people in developing nations. Glasses allow people with bad vision to see normally.