CES also increases your attention span. One study showed a remarkable 382% increase in attention and concentration span after a single treatment. In other words, you become more vigilant and aware of your surroundings during and after a CES treatment.
There are many applications of this phenomenon, for example in sports where the athlete has to concentrate intently (e.g., archery, gymnastics, golf) or during studying. People with shortened attention span can also benefit from CES treatment.