Schools and most occupations require increasing amounts of printed and computer information to be handled accurately and in shorter periods of time.
Vision is also a major factor in sports, crafts, and other pastimes.
The efficiency of our visual system influences how we collect and process information. Repetitive demands on the visual system tend to create problems in susceptible individuals. Inefficient vision may cause an individual to slow down, be less accurate, experience excessive fatigue, or make errors. When these types of signs and symptoms appear, the individual's conscious attention to the visual process is required. This, in turn, may interfere with speed, accuracy, and comprehension of visual tasks.