If the user is already wearing spectacles or contact lenses, the problem tend to be worse since the eyes have to compensate for the optical aids apart from the strain. All this is due to the fact that most users tend to bring the phone close to the eye.
    Another hassle is using a smartphone while travelling. The jolts and shakes of travel-whether by car,bus or train-also increase the stress.
              Simple reviewing causes the smartphone to be held at a 14-16 inch distance, prolonged viewing especially in the young is often at 10-12 inches. In excess,this can lead to MYOPIA.multiple reports have shown an increasing number of cases of myopia in young adults.
           What is the solution? smart phones are now so appearing that one cannot do without them.

                                                                     Here are few tips:

         1. Reduce the time spent on these devices and get a device with a larger screen.
        2. Use the device only for the minimum required quantum of work on a 4 inch screen device.
         3. Restrict daily e-mail activities to a computer with a large screen.
           A common technique of reducing eye strain by computer use - the 20-5 system, whereby for every 20 minutes of work, five minutes are devoted to looking at a point on the horizon that relaxes the accommodation muscles and prevents eyestrain from developing - is equally applicable to the smartphone.