Key Benefits

• Filters blue light up to 15x more effective.

• Studies measured up to a 300% increase in melatonin levels.

• 9/10 feel reduced eye strain.

• 7/10 feel relief from headaches.

• Features clear, ophthalmic-grade lenses.

Nash - Black features a proprietary blue light filtering solution designed to effectively improve the quality of sleep, reduce digital eye strain and improve cognitive performance. Felix Gray reinvented blue light glasses grounded in science to reduce the impact of overexposure to high-energy visible light from digital devices and artificial lighting, which may affect the quality of sleep and cause visual discomfort. Its double-sided, anti-glare coating reduces reflections to enhance visual comfort in various lighting conditions.

The lenses offer up to 15x more effective protection against harmful blue light, as well as 100% UVA and UVB protection, shielding the eyes from the most harmful rays without altering colour perception. Made with Grade A ophthalmic quality lenses, Nash - Black ensures sharp, distortion-free vision. The hand-finished organic acetate frame adds a refined touch to this high-performance design.

Frame Measurements
- Frame Size: Medium
- Lens Width: 49mm
- Bridge Width: 17mm
- Temple Arm Length: 140mm
- Total Frame Width: 135mm

Felix Gray’s lenses use a proprietary formula that filters up to 15 times more of the most impactful blue light than other clear blue light lenses. Their solutions are grounded in science and deliver a significant impact on areas that are most affected by overexposure to high-energy visible light: sleep, health and productivity. This unique protection supports the eyes during extended exposure to screens and artificial light, helping to reduce potential eye strain and disturbed sleep.

Founded in 2016, Felix Gray set out to pioneer the category of blue light eyewear, grounded in the mission to boost digital wellness, helping people live healthier, more productive lives in the modern world where artificial blue light is everywhere. The team collaborated with experts to create eyewear that blends function, science, and style. Felix Gray glasses filter blue light differently, and reduce glare without distorting colour. The brand’s lenses are backed by research and doctor-endorsed to help with eye discomfort, disturbed sleep and headache relief. With science-led design and premium materials, Felix Gray helps you protect your eyes, restore natural sleep, support recovery and unlock deeper focus during screen time.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

Wear two to three hours prior to bedtime to help unwind and prepare your body for sleep. Studies measured Felix Gray wearers fall asleep faster, wake up less during the night and hit REM sleep stage 35% faster.

Wear daily during screen exposure or prolonged use of digital devices to help reduce visual discomfort and maintain sharper focus. A large-scale office study demonstrated that wearers’ cognitive performance increases by 47% when wearing Felix Gray glasses during the day.

Clean lenses regularly using a microfibre cloth and lens-safe cleaning solution. Avoid abrasive cleaners and rough materials that may damage the coatings. Store in a protective case when not in use to prevent scratches or warping. Keep away from direct heat or prolonged sunlight to maintain frame integrity.