Because we spend so much time staring at electronic screens these days, it’s common for eye doctors to be asked if exposure to the blue light they emit can lead to macular degeneration or blindness. Some optometrists even advise getting glasses that filter out blue light. But the Harvard Health Blog says you don’t have to worry:

Compared to the risk from aging, smoking, cardiovascular disease, high blood pressure, and being overweight, exposure to typical levels of blue light from consumer electronics is negligible in terms of increased risk of macular degeneration or blindness. Furthermore, the current evidence does not support the use of blue light-blocking lenses to protect the health of the retina, and advertisers have even been fined for misleading claims about these types of lenses.

That said, the blog warns that there are legitimate concerns about screen use: “[T]he use of these devices may disrupt sleep or disturb other aspects of your health or circadian rhythm. If you are one of the large number of people who fall into this category, talk to your doctor and take steps to limit your use of devices at night, when blue light is most likely to impact your biological clock.”