Efficacy and Tolerance of Full Field Peripheral Defocus Spectacles for the Control of Myopia Progression (Myofix Study)

The purpose of this study is to evaluate the efficacy and tolerability of the use of a new model of spectacles designed to control the progression of myopia in childhood. School myopia in children is mainly produced by increased ocular growth. This new spectacle design is based in the fact that positive lenses in front of eyes produce changes that decrease ocular growth. It consists of a full field peripheral positive defocus lens and a central section for the distance correction. The study is designed to evaluate tolerance and efficacy of this new lens in myopic children along a two year period.