Frequently Asked Questions
Do KRONVEIL lenses actually block blue light?
Yes. Our lenses filter 99% of high-energy blue and green light in the 400–550 nm range — the wavelengths most disruptive to melatonin production.
When should I wear them?
From sunset to bedtime, or any time you're in front of artificial light at night. Most customers put them on 1–2 hours before sleep.
How long does shipping take?
Free 8–10 day worldwide shipping. You'll receive a tracking number by email once your order ships.
What's your return policy?
30-day money-back guarantee, no questions asked. See our Refund Policy page for details.
Can I wear them over prescription glasses?
Our standard frames are designed to fit comfortably and are not over-glasses. Prescription-compatible options are coming soon.
Are they safe for daily use?
Yes. KRONVEIL lenses are a consumer eyewear product designed for evening wear. They are not a medical device.