Read short messages or surfing the Internet through a smartphone tend to force people’s eyes to work harder than when reading books or newspapers. A study involving 130 volunteers, with an average age of 23.3 years old, studied how people hold the phone while reading a short message. Then, another 100 volunteers, with an average age of 24.9 years old were studied while they read the pages.
When we read newspapers, books, or printed magazines, the average distance to the eye is 40.64 centimeters. Apparently in average, people who read or send short messages is only 35.56 centimeters. (more…)