Answer:

Blue light, part of the visible light spectrum, has high energy and short wavelengths (around 400-490 nm). It is emitted from the sun and digital devices like phones, computers, televisions, and LED lights.

Blue light glasses are designed with a special coating that can filter out some of the blue light from electronic screens. However, experts currently lack clear scientific evidence that blue light from digital devices causes serious damage to the retina or is the main cause of computer vision syndrome (CVS).

Blue light glasses are not a required or only solution for eye protection, but they can be helpful for some. You can wear them in the evening to reduce blue light, which can affect your circadian rhythm and sleep quality. If you experience frequent eye strain, instead of relying solely on blue light glasses, you should rest your eyes every 20 minutes while looking at a screen, and maintain a distance of 50-70 cm when using a computer.

Office workers should rest their eyes every 20 minutes and maintain a distance of 50-70 cm while using a computer. Illustrative photo: Dieu Minh

If your eyes are dry, blink frequently and use eye drops. In the evening, for better sleep quality, stop using electronic devices at least an hour before bed. If you have persistent vision problems, consult an ophthalmologist.

Pham Huy Vu Tung, MSc, MD

High-Tech Eye Center

Tam Anh General Hospital, TP HCM