What does blue light do to your eyes?

What does blue light do to your eyes?

With many employees working from home and children doing online learning, many people wonder: Does blue light from screens damage the eyes?

The main source of blue light is sunlight. However, it is also emitted by many modern electronic devices and fluorescent lights. Producing high amounts of blue light is the bright-white LED displays of smartphones, tablets and laptops. It is known to affect the circadian rhythm or the body’s wake and sleep cycle. It keeps you energized and improves your mood during daytime, but it also suppresses your sleep signal called melatonin. That is why many experts recommend limiting screen time in the two or three hours before you go to bed.

At present, there is no strong scientific evidence that shows that blue light will increase the risk of conditions like age-related macular degeneration or harm any part of the eye. However, what we know for sure is that constant and prolonged exposure to digital screens can lead to digital eye strain.

When you have digital eye strain, you may experience blurred vision, eye redness, excessive tearing, headache and sandy feeling in the eyes. While these symptoms are usually caused by the glare, levels of brightness, the different colors or font sizes of our monitors, blue light can also contribute to digital eye strain.

How do you protect your eyes from blue light? On its own the eye cannot block the blue light, so it easily passes through the cornea (the clear front layer of the eye) and the lens.

A convenient way to protect your eyes from blue light exposure is by wearing blue light filtering glasses. These are especially designed lenses that block or filter out blue light coming from digital screens.

Some blue light glasses are clear, while some have a yellow tint. Yellow tints are known to provide more protection from blue light and increase comfort while using digital screens.

If you find that devices are disrupting your sleep, talk to your doctor to learn about the best blue light glasses for you. Aside from that, practice eye-friendly habits to prevent digital eyestrain, such as resting your eyes for 20 seconds every 20 minutes of work, blinking more frequently, and sitting 18 to 24 inches away from your monitor.