Most device screens emit unnaturally high levels of blue light, and exposure to a lot of blue light can negatively impact your eye health in various ways. Symptoms of digital eye strain can involve reduced blinking (which leads to dry, ‘scratchy’ eyes as tears evaporate) and squinting (which can affect vision quality). Blue light has also been linked to eye surface toxicity and infections.
There is also some evidence to suggest that long-term exposure to high levels of blue light could increase your risk of developing diseases of the retina like macular degeneration or atrophy of the retina.