Nox vs migraine glasses

How migraine glasses work

Migraine glasses use tinted lenses to filter specific wavelengths of visible light before they reach your retina. The underlying science targets a class of neurons called intrinsically photosensitive retinal ganglion cells (ipRGCs), which express a photopigment called melanopsin. Melanopsin peaks at approximately 480nm (blue-cyan light), and research has shown that this wavelength range is the primary driver of migraine photophobia.

The most studied tint is FL-41, a rose-colored optical filter originally developed for patients sensitive to fluorescent lighting. FL-41 selectively attenuates wavelengths in the 480 to 520nm range while preserving most of the visible spectrum. In a clinical trial, FL-41 lenses reduced migraine frequency by 74%, compared to 36% for standard blue-blocking lenses.

Newer lens technologies like Avulux take a different approach: multi-band filtering that targets multiple wavelength ranges associated with photophobia while passing narrow-band green light (around 520 to 540nm), the only color shown in research to not worsen migraine pain. For more on how tinted glasses for migraines work across different brands, see our detailed guide.

Major migraine glasses brands compared

Several companies sell glasses specifically marketed for migraine and photophobia. Here is how the main options break down.

TheraSpecs ($99 to $299) are among the most recognized migraine glasses. They use an FL-41 tint and are available in both prescription and non-prescription frames. TheraSpecs have a noticeable rose/pink tint and are available as indoor and outdoor versions.

Avulux ($149 to $299) uses a proprietary multi-band spectral filter rather than traditional FL-41. Avulux lenses filter blue and amber light while allowing green wavelengths to pass through. They have a lighter tint than FL-41 glasses, appearing more like a faint gray or green. Avulux has published peer-reviewed research on their specific lens design.

Axon Optics ($179 to $309) also uses FL-41 filtering and offers a wide range of frame styles. Like TheraSpecs, they carry a visible pink tint. They offer both therapeutic indoor lenses and transition-style lenses for outdoor use.

Zenni FL-41 ($30 to $60) is the budget option. Zenni offers FL-41 tinted lenses in their standard frames, making them the most affordable entry point. The tint quality may vary compared to dedicated migraine eyewear brands, but they use the same core FL-41 filtering principle. Wondering whether blue light glasses actually work for migraines? We break down the evidence separately.

Where glasses excel

Migraine glasses have clear strengths that software cannot replicate.

They work everywhere. Glasses filter all incoming light, not just screen light. Fluorescent office lighting, sunlight, LED overhead fixtures, car headlights at night. If photophobia-triggering wavelengths are present in your environment, the lenses attenuate them regardless of the source.

No technology required. You put them on and they work. No app to configure, no compatibility to worry about, no battery to charge. This simplicity matters during a migraine attack when interacting with software can feel overwhelming.

They protect your eyes from all angles. Light enters your field of vision from every direction. Glasses (especially wraparound styles) filter peripheral light that a screen filter cannot address.

Established clinical evidence. FL-41 lenses have decades of published research behind them, including randomized controlled trials. The evidence base for tinted migraine lenses is well established.

Where glasses fall short

Despite their strengths, migraine glasses come with meaningful tradeoffs.

Cost adds up quickly. Quality migraine glasses range from $99 to $300 for non-prescription frames. Add prescription lenses and you can easily spend $300 to $500. If you need both indoor and outdoor pairs, or if your prescription changes, you are looking at replacing an expensive item.

Visible tint changes your appearance. FL-41 lenses have a distinctive pink or rose tint. Avulux lenses are less tinted but still noticeable. Many people feel self-conscious wearing visibly tinted glasses in professional settings, on video calls, or in social situations.

One fixed filtering profile. Each pair of glasses has a single spectral profile baked into the lens. You cannot adjust the intensity based on how you feel, switch between an FL-41 tint and a 480nm notch filter, or dial back the filtering on a good day. What you buy is what you get.

Prescription dependency. If you already wear corrective lenses, you need either prescription migraine glasses (adding significant cost) or fit-over frames that go on top of your existing glasses (adding bulk and discomfort).

How Nox works differently

Nox is a macOS app that applies spectral wavelength filtering directly to your display. Instead of filtering light at the lens, it modifies the light your screen emits in the first place.

Each filter preset in Nox is defined as a 41-point spectral transmittance curve spanning 380nm to 780nm. The app integrates these curves against your display's primary emission spectra (the red, green, and blue phosphors) to compute per-channel attenuation factors. The result is written to your display's hardware gamma table through a 6-stage pipeline that handles spectral filtering, color temperature, dimming, contrast, black point, and gamma correction.

Nox ships with 12 research-based presets, including an FL-41 clinical tint that emulates the spectral profile of FL-41 lenses, a 480nm notch filter that targets the melanopsin peak with minimal color distortion, and a narrow-band green mode that passes only 520 to 540nm. A real-time melanopic suppression metric shows you exactly how much migraine-triggering light your current filter removes.

It costs $5, one time. No subscription.

Strengths of software filtering

Adjustable intensity and multiple profiles. You can switch between presets depending on how you feel. Light sensitivity building up? Switch from the subtle notch filter to the more aggressive FL-41 tint. Having a good day? Dial back to a minimal filter. Glasses cannot do this without swapping pairs.

No visible tint on your face. The filtering happens at the screen, so your appearance in video calls and meetings is unaffected. Nobody knows you are using a migraine filter unless you tell them.

Dramatically lower cost. At $5 for a lifetime license, Nox costs a fraction of even the cheapest migraine glasses. You can try research-based spectral filtering without committing hundreds of dollars.

Access to multiple filtering approaches. Nox includes FL-41, 480nm notch, narrow-band green, and nine other presets all in one app. With glasses, each filtering approach requires a separate pair. Trying multiple approaches to see which works best for you would cost hundreds of dollars in lenses alone.

Works with your existing setup. No prescription needed. No frames to choose. No waiting for lenses to ship. You download the app and start filtering immediately.

Limitations of software filtering

Only filters screen light. Nox modifies what your Mac display emits. It does not filter overhead fluorescent lights, sunlight coming through a window, or the glow from a colleague's monitor. If your photophobia triggers come from ambient light sources, you still need physical filtering.

macOS only. Nox currently runs on Mac. If you primarily use Windows, an iPad, or a phone, Nox cannot help with those screens. For reducing eye strain from screens on other devices, physical glasses remain the primary option.

Requires a running app. Unlike glasses that work passively, Nox is software that needs to be running on your computer. During a severe migraine attack, if you are away from your Mac, it provides no benefit.

Best of both worlds: using Nox and glasses together

Here is the thing: migraine glasses and Nox are not competing solutions. They complement each other.

Glasses filter ambient light from every source in your environment. Nox filters screen light with more precision and flexibility than a fixed lens tint can offer. Used together, you get comprehensive coverage.

A practical setup might look like this. Wear your FL-41 or Avulux glasses to handle overhead lighting, window glare, and other ambient sources. Run Nox on your Mac with the 480nm notch filter or narrow-band green preset to add screen-level filtering on top of what your glasses provide. The combined filtering is more thorough than either approach alone.

This is especially useful because screen light is the light source you stare at most directly, for the most hours per day. Even with migraine glasses on, your display is still pumping specific wavelengths directly into your eyes. Nox lets you reduce those wavelengths at the source, so your glasses have less work to do.

On days when your light sensitivity is mild, you might skip the glasses and just use Nox. On bad days, you use both. The flexibility is the point.

Quick comparison

Feature	Migraine glasses	Nox
Filtering approach	Tinted lens (FL-41, multi-band)	41-point spectral curve at the display
Light sources covered	All (ambient, screen, sunlight)	Mac screen only
Adjustable intensity	No (fixed tint)	Yes (12 presets, plus custom)
FL-41 clinical tint	Yes	Yes
480nm notch filter	Some brands	Yes
Narrow-band green mode	No	Yes
Melanopic suppression readout	No	Real-time percentage
Visible tint on your face	Yes (pink, rose, or gray)	No
Works without a computer	Yes	No
Prescription compatible	Extra cost ($100 to $300+)	Not applicable
Price	$30 to $500+	$5 (lifetime)
Best for	All-environment light filtering	Screen-specific, adjustable filtering

Which should you choose?

If you only experience photophobia from screens (especially during long work sessions on your Mac), Nox alone may be enough. It gives you research-based spectral filtering at a fraction of the cost, with the flexibility to adjust your protection throughout the day.

If ambient light is a significant trigger, migraine glasses are worth the investment. No software can filter the fluorescent lights in your office or the sunlight streaming through your car windshield.

If you want the most thorough protection, use both. Glasses for the environment, Nox for the screen. The two approaches stack, and the combined cost (glasses plus $5 for Nox) is still less than buying a second pair of specialized lenses.

Either way, the goal is the same: reduce the specific wavelengths of light that research has linked to migraine photophobia, and do it in a way that fits your life. Whether that means a pair of rose-tinted glasses, a software filter on your display, or both, you are targeting the same underlying neuroscience. The right answer depends on where your light triggers come from and how much flexibility you need. For a step-by-step setup guide, see best screen settings for migraines.

If you want to see how Nox compares to general screen warmers like f.lux, read our Nox vs f.lux breakdown.