It is common to find people around the age of 40 holding books, magazines, newspapers, menus or other reading materials at arm's length when reading, they have to hold reading materials at a distance because they suffer presbyopia and they need to focus properly. If you get presbyopia, you will have difficulty in reading fine print, particularly in low light conditions. And after reading for a long time, you can feel eye strain and you can find your vision becoming blurred in the course of transitioning between viewing distances. In addition, when you carry out close work, you may develop headache or feel fatigue.