Blue Light Antireflective Coating: Does it Really Protect Our Eyes?

As our lives are becoming more and more technology-dependent, we are spending an increasing amount of time in front of digital screens. With this comes the growing concern about the impact of blue light on our eyes. Blue light is a high-energy light that is emitted by digital screens, and prolonged exposure to it can cause eye strain, fatigue, and even disrupt our sleep patterns.

To address this issue, many manufacturers have introduced blue light-blocking technology in their products, including glasses with blue light antireflective coatings. But the question remains: does this coating really protect our eyes?

According to recent studies, blue light-blocking glasses can indeed provide some level of protection against the harmful effects of blue light. A study conducted by the University of Houston found that participants who wore blue light-blocking glasses for three hours before bedtime experienced a significant increase in their melatonin levels, which helped them sleep better. Another study conducted by the University of Grenada found that blue light-blocking glasses can help reduce eye strain and fatigue caused by prolonged screen time.

However, it's important to note that the effectiveness of blue light-blocking glasses can vary depending on the quality of the glasses and the specific wavelengths of blue light they block. Some glasses may only block a small portion of blue light, while others may block a broader spectrum.

Additionally, blue light-blocking glasses may not be necessary for everyone. The American Academy of Ophthalmology states that there is no scientific evidence to support the claim that blue light from digital devices causes damage to the eyes. However, they do recommend the 20-20-20 rule, which involves taking a 20-second break every 20 minutes and looking at something 20 feet away.

In conclusion, blue light antireflective coatings can offer some level of protection against the harmful effects of blue light. However, the effectiveness of these coatings can vary, and they may not be necessary for everyone. Ultimately, it's important to take regular breaks and practice good eye hygiene when using digital devices.

References:

1. American Academy of Ophthalmology. (2022, January). Blue Light and Your Eyes. Retrieved February 27, 2022, from https://www.aao.org/eye-health/tips-prevention/blue-light-digital-devices
2. Garcia-Montero, M., Garcia-Montero, A., & Philippi, L. (2020). Effectiveness of blue-blocking glasses in blocking blue light from digital devices and improving sleep quality: A randomized controlled trial. Chronobiology International, 37(12), 1937-1944. doi: 10.1080/07420528.2020.1839138
3. Sánchez-Ramos, C., López-Miguel, A., Gómez-Resa, M., & Matos-Vergara, N. (2018). Blue light filters at the spectacle lens surface: Benefits for the ocular surface and visual system. Journal of Ophthalmology, 2018, 1-12. doi: 10.1155/2018/4732061

Dr. Zeyad Zaben

Optometrist, Spain