Smartphones may make your eyes tired

Recent study suggests that when people reading text messages or browsing websites, they will make their faces get closer to the smartphones than traditional media, such as a newspaper.This trip - small fonts and more smartphones - could cause further pressure on people who already wear glasses or contact lenses, says the study, published in the July issue of Optometry and vision science."And 'that people find the device a short distance, the eyes must work harder to make a constant and look in the right direction," said co-author Dr. Mark Rose Field, a professor at the College of Optometry, SUNY, New York. "The fact that the eyes are forced to work means that more people may have symptoms such as headaches and eyestrain is".Text messaging and web browsing on smartphones can also lead to dry eyes, blurred vision and discomfort after prolonged use, the authors say. Previous studies have, moreover, that up to 90 percent of the people in computers and eye problems.Rose on the ground had the idea of ​​the study, while traveling by train, and recognize that smart phone users tend to be around her.That adults and children, and also writes for smartphones, or search for restaurant reviews, which makes sense, simply measuring the number of people all taking their mobile phones.The experiments were simple enough. The first 130 questions revealed the average age of 23.2 years, to keep your smartphone read the text.In another experiment, 100 participants with a mean age of 24.9, go to bat to play your smartphone to read a Web page.The researchers measured the distance between the camera and the eye, and the font size.Reading the text printed in newspapers, books and magazines, the average working distance is 16 inches in the eye, but the study participants, writing or sending text messages from your mobile phone moving averages 14 inches. In some people, was about 7 inches in the neighborhood, said Rosenfield.When viewing a Web page, the average distance of 12.6 centimeters of work.The source text messages tend to be slightly higher (10 percent on average) than the headlines, but the original site was printed in only 80 percent of log size, and in some cases less than 30 percent, Rosenfield said.The conclusions contain messages for doctors and smartphone users.Given the ubiquity of mobile devices may contain ophthalmologists to test the vision of people over short distances and shorter distances for a pair of glasses.But it is an easy way for addicts to minimize eye strain Smartphone: Increase the font size unit, said Dr. Scott MacRae, Professor of Ophthalmology and Visual Sciences, University of Rochester Medical Center and an ophthalmologist.This is particularly important for sustained reading, like reading a book on the Kindle, he said.Reader font size electronic book is quite easy to do. For other handheld devices, "said MacRae," The problem is finding a way to do it. "If you are a regular user, try using a 12-point Verdana font, font size only developed specifically for personal computers, said MacRae.The Kindles and IPads are being assessed by the authors, the conclusion have not been showed to the public.