The ability to change focus rapidly when looking far away, close up, and back again is called accommodation. The accommodation system is responsible for maintaining clear vision at all distances which is important for visual stamina throughout a day of frequent changes in focus from chalkboard to book, computer, paper, etc. Reduced accommodative skills often contribute to blurred vision, eye strain, headaches, difficulty reading, avoidance of near work, or eye fatigue at the end of the day. A program of vision therapy can help reduce these symptoms by improving eye focusing and increasing the efficiency of the accommodation system.