This method is called "20-20-20-20". Its essence is that the person sitting at the computer, every 20 minutes departed from a computer screen, and for the next 20 minutes staring at distant objects that are at a distance of at least five meters.
In addition, during this time, it is necessary to blink at least 20 times. Experts believe that through this exercise one can avoid the drying of the eyes (which is one of the main causes of visual impairment) for headaches and neck pain.
This method is particularly relevant for those who have all day to sit at the computer. Yet such is the "charging" need for those who work at a computer in a room with air conditioning. Because air conditioning exacerbates the dry eyes.