Back to Coatings
Blue Light Filter Coating
Add-on from$20
Blue light filter (BLF) coating selectively blocks harmful high-energy blue-violet light from screens and LEDs while allowing beneficial blue-turquoise light through. Reduces digital eye strain.
Starting fromFrom $20
What Is Blue Light?
Blue light refers to the visible light spectrum between 380–500nm. Within that range:
- Blue-violet (380–440nm): High-energy light that may contribute to digital eye strain and long-term retinal stress. Emitted in significant quantities by LED screens, smartphones, and LED lighting.
- Blue-turquoise (440–500nm): Beneficial — regulates the body's circadian rhythm (sleep-wake cycle). Blue light filters are designed to block the harmful portion while allowing this to pass.
Symptoms of Digital Eye Strain
Prolonged screen exposure can cause:
- Eye fatigue and dryness
- Headaches and migraines
- Blurred vision after screen use
- Difficulty sleeping (melatonin suppression from evening screen exposure)
Blue Light Filter Options
- Blue-light blocking coating: Applied to standard or high-index lenses. A slight yellow tint to the lens at certain angles. Most cost-effective option.
- Crizal Prevencia: Essilor's premium blue-light filter. Available as part of the Crizal Sapphire package.
- Eyezen lenses: Include Essilor's W.A.V.E. Technology for selective blue-light filtering built into the lens material itself.
Do Blue Light Glasses Actually Work?
Studies on blue light glasses are mixed. Many users report reduced eye strain and better sleep quality. The American Academy of Ophthalmology notes that digital eye strain is largely caused by reduced blink rate during screen use — taking regular breaks (20-20-20 rule) is also important.
Common Questions
Can I add multiple coatings to one lens?
Yes. Scratch-resistant, UV, tint, and anti-reflective coatings can all be combined. Crizal AR coating includes scratch resistance — you wouldn't add a separate hard coat.
Are coatings permanent?
Coatings are applied directly to the lens surface and are permanent under normal conditions. Avoid abrasive cleaners, paper towels, and extreme heat (like leaving glasses in a hot car).
Which coating is the most important?
For everyday wear: anti-reflective coating makes the biggest quality-of-life difference. For outdoor use: UV protection and polarization or transitions. For screen users: blue light filtering.
Get Blue Light Filter Coating
Order through LensesRx.com — choose the option that fits your situation.