Of course it is possible that your eye power may also have increased as you age - but this increase would have happened regardless of whether you wore the glasses or not. When children become nearsighted (myopic), usually between the ages of 8 and 12, there is a natural progression in their myopia and a need for a stronger correction over the next few years. These children, as well as nearsighted adults, may believe that glasses have weakened their eyes when their lens prescription needs to be made strong. Glasses, however, do not weaken eyes; they are simply aids to improve vision. People who have been able to read easily close up without glasses may find that they cannot do so as they get older (past 40). When they begin to need stronger and stronger glasses, they may assume that wearing glasses has "ruined" their eyes. In actuality, they are experiencing a normal condition called presbyopia - the inability of the aging eye to focus on near objects.