MYOPIA CONTROL SPECTACLES SHOW DECREASED EFFECTIVENESS IN PATIENTS WITH CONVERGENCE EXCESS

 

According to this study, "myopic subjects with convergence excess had faster elongation (resulting in faster progression of myopia) than normal myopic children in DIMS wearers (those who wore the myopic control spectacles). 

The article suggests that this occurs because convergence excess causes an accommodative lag that creates greater peripheral retinal defocus, thus counteracting the effect of the myopia control lenses.