In today’s digital age, we are constantly exposed to screens and artificial light sources, which emit harmful blue light. This prolonged exposure has raised concerns about its potential impact on our eye health and overall well-being. Thankfully, advancements in optical technology have led to the creation of blue light glasses, designed to mitigate the harmful effects of blue light. In this blog post, we will delve into the science behind Essilor’s Crizal Prevencia coating, a pioneering solution that protects our eyes while preserving visual clarity and comfort.

Understanding Blue Light

Blue light is a high-energy, short-wavelength light that exists naturally in sunlight and is emitted by digital screens, LED lights, and fluorescent bulbs. While exposure to natural blue light is essential for regulating our sleep-wake cycles and boosting mood, excessive exposure to artificial blue light can be detrimental to our eyes.

One of the major concerns is that blue light has the potential to penetrate deep into the eye, reaching the retina. Prolonged exposure to blue light may increase the risk of digital eye strain, also known as Computer Vision Syndrome (CVS), and contribute to the development of age-related macular degeneration (AMD).

Crizal Prevencia Coating: The Science

Essilor, a renowned leader in the optical industry, developed the Crizal Prevencia coating to address the growing concerns about blue light exposure. Unlike traditional anti-reflective coatings that solely focus on reducing glare and reflections, Crizal Prevencia is specifically engineered to selectively filter out harmful blue-violet light while allowing beneficial blue-turquoise light to pass through.

  1. Selective Blue Light Filtration: Crizal Prevencia utilizes advanced filtering technology to target the specific wavelengths of blue-violet light (415-455 nm) that are most harmful to our eyes. By blocking out a significant portion of this harmful range, the coating effectively reduces the potential for retinal damage and helps prevent digital eye strain.
  2. Preserving Visual Clarity: One of the remarkable features of Crizal Prevencia is its ability to maintain the transparency of the lenses. Unlike some other blue light glasses that may impart a noticeable yellow tint, this coating is virtually clear, ensuring natural color perception and minimal visual distortion.
  3. UV Protection: In addition to shielding against blue-violet light, Crizal Prevencia also provides reliable UV protection, safeguarding the eyes from harmful ultraviolet rays present in sunlight. This feature is particularly valuable when wearing these glasses outdoors.
  4. Improved Contrast and Reduced Glare: Along with blue light protection, Crizal Prevencia coating also reduces glare from digital screens and artificial light sources. By minimizing reflections on the lenses, enhances visual comfort and ensures a more relaxed viewing experience.

The Impact on Eye Health

Prolonged exposure to screens has become an unavoidable aspect of modern life, making blue light glasses a crucial accessory to safeguard our eyes. By integrating Crizal Prevencia coating into their lenses, wearers can benefit from reduced digital eye strain, minimized risks of AMD, and improved overall eye health. The coating’s effectiveness has been validated through extensive research and testing, making it a trusted choice for eye care professionals and users alike.


As the world becomes increasingly reliant on digital devices and artificial lighting, it’s essential to take proactive measures to protect our eye health. Essilor’s Crizal Prevencia coating offers an innovative solution that selectively filters out harmful blue-violet light, mitigating the potential risks of prolonged blue light exposure. With its clear lenses, UV protection, and enhanced visual comfort, these blue light glasses are a valuable investment in maintaining healthy eyes in today’s digital-centric world. 

Remember, while blue light glasses are beneficial, it’s also essential to practice healthy screen habits and take regular breaks from digital devices to maintain overall eye health. If you’re looking to reglaze your specs or buy prescription eyeglasses online, consider exploring options like Reglazemyspex for glasses lens replacement in the UK. They offer a comprehensive service to revive and restore your eyeglasses back to their original glory.

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