The time that most people spend staring at the screen has increased dramatically over the past ten years. If a person is not working on a computer, they are probably following the online community through their smartphone or tablet. Bookshelves are being replaced by a single e-book and TV shows and movies available anywhere, anytime.
But what does this mean for human vision?
Perhaps many will be pleased to know that recent studies have found no evidence that additional time spent behind the screen can harm the eyes. They argue that as soon as a person reaches the age of 10, nothing can harm his eyesight, with the exception of very bright light, of course. Until the age of 10, what a child looks at and how clearly he sees it can affect vision, as the neural pathways between the eye and the brain are still developing.
In the process of reading from a sheet of paper, light is reflected from the surface of the sheet onto the person’s eyes. While reading from the screen, this light is emitted directly by the monitor. Some are afraid of the “radiation” emanating from electronic devices, but most emissions outside the visible spectrum are harmless, or are absorbed by the tear film of the eye.
Many people complain of headache and eye pain that appears after a long period of time in front of the monitor. This is because when looking at the screen, the eyes focus on close objects, doing work that they were not originally intended to do. In order to look at objects up close, the muscles inside the eye contract. When a person is fixated on a nearby object, he must also turn his gaze inward. This is called convergence. This causes constant eye strain, fatigue and headaches. However, these symptoms are not related to that. What a person reads from the screen. When working with paper media, the effect will be the same.
The font size also does not affect vision as long as the reader is able to concentrate on the screen without straining his eyes. Increasing the brightness will help you see the fine print more clearly.