Gafas con filtro rojo - Red Filter Glasses

They promote your nightly rest

By filtering 99.93% of HEV blue light and 99.9% of green light in the hours before sleep, they help prevent your body from halting melatonin production, allowing it to prepare for sleep naturally.

They support your circadian rhythm

Your internal clock doesn't just respond to blue light: its sensitivity extends to green light, exactly where screens concentrate most of their brightness. By cutting these two bands, your body continues to interpret day and night as it should, even if you finish your day in front of a screen.

Greater visual comfort in low light

The red lens softens the glare from phones, computers, and televisions in dim environments, alleviating eye strain at the end of the day.

Measured filtration, not just promised

Micro-Light Optics, an independent laboratory, measured the lens transmittance every 10 nm across the entire spectrum: below 1% throughout the 400 to 580 nm range.

Filtration that doesn't wear off

The red pigment is physically infused into the lens, not a surface coating. The filtration remains constant and uniform use after use, without degrading from cleaning.

Lightness you forget you're wearing

At only 34 grams with a hand-polished, hypoallergenic Mazzucchelli acetate frame, they can be worn for hours without discomfort or marks.

A simple gesture for self-care

No apps, no complicated routines, no giving up your screens. Put them on 1 to 3 hours before sleep and let them do their job.

How they work, scientifically speaking

The key lies in the retina. In addition to the rods and cones we use to see, the eye has a third type of photoreceptor: intrinsically photosensitive retinal ganglion cells (ipRGCs), which contain a photopigment called melanopsin. Its peak sensitivity is around 480 nm, right in the blue band of the visible spectrum. But the curve doesn't drop to zero there: sensitivity remains significant into the green, around 530 to 550 nm. And green is where screens concentrate the most brightness, because it is the area to which the human eye responds with the greatest intensity.

When these cells detect that light, they send a direct signal to the suprachiasmatic nucleus, the brain's central circadian clock, which in turn regulates melatonin secretion in the pineal gland. By day, this is a useful mechanism: it keeps us alert. At night, screen light activates this same pathway; the brain interprets it as still being daytime and slows down melatonin production, delaying sleep.

That is why a filter that only cuts a narrow band of blue lets much of the signal through. Red Filter Glasses intervene across the full range, at the source of the problem—the light reaching the eye:

Verified 99.93% filtering of HEV blue light, from 380 to 490 nm, and 99.9% of green light, from 500 to 570 nm. Measured by Micro-Light Optics, an independent laboratory, with transmittance recorded every 10 nm across the entire 280 to 780 nm spectrum. Report available upon request.

Physical red pigment infusion: the pigment is integrated into the lens material, not a surface coating. This is why the filtration is homogeneous across the entire surface and does not degrade with cleaning or use.

Resulting spectrum close to sunset: transmission remains below 1% in the entire 400 to 580 nm range and only rises starting at 590 nm, into the red. The light that passes through the lens resembles that of dusk, consistent with the signal the body expects at that hour.

The optical substrate is CR39 (Columbia Resin #39, poly(diethylene glycol bis-allyl carbonate)), an organic resin with a refractive index of approximately 1.50 and an Abbe number close to 58, which translates into sharp optics and low chromatic aberration. It is also lighter and more impact-resistant than mineral glass.

An honest clarification: these lenses are not sunglasses or driving glasses, and are not designed to be. They deliberately alter color perception, because cutting the full range that interferes with sleep and passing a traffic light perception test are incompatible objectives. It is a spectral filter calibrated for a specific biological function.

In short: 34 grams of optical engineering dedicated to one thing: ensuring your circadian rhythm does not depend on the time you turn off your screen.

• You work or relax in front of screens until late at night.
• You find it difficult to disconnect at night and want to protect your sleep without giving up your devices.
• You notice eye strain or screen glare in low-light environments.
• You want to support your circadian rhythm simply, without apps or complicated routines.
• You are looking for a carefully crafted, light, and durable piece that combines science and premium design.
• You understand well-being as something that also begins with good rest.