We could have been fortunate enough in our early years not to require glasses. Then when we reach over 40 we start to develop what the opticians call presbyopic eyes: this means the lens in your eyes loses some flexibility. As a result it becomes harder to focus on close objects. Small print can seem blurred or even indecipherable. It may therefore be more difficult to do close work such as sewing or drawing as well as reading either printed text or on a screen. The quick and most cost…