Approximately 90% of people who are blind or visually impaired live in developing countries. Cataracts are the leading cause of blindness worldwide but can be cured with a 15-minute surgery. Prescription eyewear can correct visual impairment, and medical treatment can treat eye injuries and infections. Many times those with eye disease or vision problems do not receive care because they lack the funds or transportation to see an ophthalmologist. In some areas of the world, there are no ophthalmologists.