Data from prevalence surveys conducted by the Pan American Health Organization in nine (9) countries revealed that the marginal and poor populations are who have a higher prevalence of blindness and visual disability. The burden of visual impairment in Latin America and the Caribbean is not distributed uniformly; in many countries it is estimated that for every 1 million population 5,000 are blind, and 20,000 are visually impaired, at least two thirds are attributable to treatable conditions such as cataract, refractive errors, diabetic retinopathy, childhood blindness, glaucoma, onchocerciasis and trachoma.