It has been long theorized that deliberately limiting a full myopic prescription may serve to reduce the progression of myopia. If myopic defocus on the retina is the result of such a practice, then ideally there should be a decreased accommodative demand at near and less of a stimulus for axial elongation. Studies carried out by Chung et al, 2002, and Aller et al, 2006, have actually shown that using this method of myopia control has actually led to an increase in myopia progression. It is possible that central myopic retinal defocus is not a protective factor against the development of myopia.
Concerned parents may be weary of increasing their child’s myopic spectacle or contact lens prescription, for fear that it will make their child’s vision worse. They should be informed that undercorrection as a form of myopia control has not proven to be clinically effective and any of the other methods of myopia control should be considered.