In today’s digital world, we spend many hours in front of screens — computers, mobile phones, tablets — which emit blue light. This prolonged exposure can cause eye strain, headaches and sleep problems. At CristalesGafas, we explain what blue light filter lenses are and how they can help you protect your visual health.
What Is Blue Light?
Blue light is a type of high-energy visible light (HEV) with a short wavelength, between 380 and 500 nanometres. It is present in natural sunlight but is also emitted in large quantities by the screens of electronic devices such as smartphones, computers and televisions.
While natural blue light helps regulate our sleep-wake cycle (circadian rhythm), excessive exposure to artificial blue light — especially at night — can disrupt this cycle and cause health problems.
Effects of Blue Light on Health
- Eye strain and fatigue: Prolonged exposure to screens can cause what is known as digital eye strain or computer vision syndrome.
- Headaches: Many people who spend many hours in front of screens experience frequent headaches.
- Sleep disorders: Artificial blue light at night suppresses the production of melatonin, the hormone that regulates sleep, making it harder to fall asleep.
- Long-term eye damage: Some studies suggest that prolonged exposure to blue light could contribute to macular degeneration, although more research is needed.
What Are Blue Light Filter Lenses?
Blue light filter lenses have a special coating or are made from a material that filters or blocks a percentage of blue light emitted by screens. They can be both prescription and non-prescription (without correction).
Benefits of Blue Light Filter Lenses
1. Reduction of Eye Strain
By filtering blue light, these lenses help reduce digital eye strain, making your eyes feel less tired after prolonged screen use.
2. Improved Sleep Quality
Wearing blue light filter glasses in the evening can help reduce the impact of blue light on melatonin production, improving sleep quality.
3. Prevention of Headaches
Many users report fewer headaches and migraines when using blue light filter lenses regularly.
4. Greater Visual Comfort
These lenses improve contrast and reduce glare from screens, providing more comfortable vision during long work sessions.
Blue Light Filter Lenses at CristalesGafas
At CristalesGafas, we offer blue light filter lens options for your prescription glasses or as non-prescription glasses. Our lenses are manufactured in Europe and fitted by registered optometrists. Protect your eyes from the effects of screens with our blue light filter lenses!