Most people want to have one pair of glasses to do everything. We hear this ALL of the time. We have different clothes for summer and for winter. We have different pots and pans for different purposes. We use different utensils when we eat; fork, spoon, knife, table spoon. We have many tools in the toolbox; hammer, screwdriver, pliers, saw, wrench, etc. WHY then, do we expect one pair of glasses to do EVERYTHING?