How does screen affect eyes ?
When you gaze at a screen for hours at stretch ,the effect on eyes are divided in short term and long term .
The short term effect is digital eye strain or computer vision syndrome where u feel Eye strain, burning sensation, transient blurring , redness , watering of eyes , headaches etc . They are related to accommodative strain by natural lens or due to dry eye. These symptoms are no different from the symptoms you may have when reading,
writing or doing “close work” like sewing for long stretches of time.
The long term affects like that of blue rays from screen is not scientifically proven in humans .