[Why and how to correct myopia?]

The myopia and its aggravation depend on genetic and environmental factors. Experiences performed on monkeys and chickens indicate that the quality of the image affects the growth on the ocular globe in the young animal by modifying biochemical conditions at the retinal level. If near work seems to be a factor associated to the myopia, the role of sustained accommodation on the evolution of the former is not evident. The correction of the myopia by glasses can be made with the help of different materials that will be chosen according to the importance of the myopia, the morphology of the face, the priority of the esthetics or the security.