The Sleepaxa Lens Library

The Lens Library

Every Sleepaxa lens,
explained simply.

Each Sleepaxa lens is engineered for one job — and independently lab-tested. Here is what every lens does, its tint, how much light it lets through (VLT), which wavelengths it calms, and exactly when to wear it.

Quick answer

Sleepaxa makes wavelength-selective photobiological lenses in four families. Migraine & photophobia: FL-41 (pink-rose, 60% VLT), FL-41 Darker (41%), and the patented NeuroCalm FLX+ (smoke grey-green, 22% VLT, Patent No. 587746) — all calming the 480–520 nm blue–green band. Sleep & evening: Amber Evening (50%), Red Sleep (15%), and Circadian560 (wine red, 17%, blocking 100% below 560 nm). Daytime/screens: DayActive 1.0 (yellow, 76%, high-HEV). Colour contrast: Chrome Assist Pro (coming soon). Every lens is available in zero power, prescription and progressive, with high-index (low-thickness), custom, and kids-to-adult options.

Read this first

Three words, in plain language.

VLT

How bright the lens feels

Visible Light Transmission = how much light passes through. Higher % = lighter/brighter (e.g. 76% is barely tinted), lower % = darker (e.g. 15% is deep, for night). Lab-measured.

Wavelength

Which light it calms

Light is a spectrum measured in nanometres (nm). Migraine/photophobia is driven mostly by blue–green ~480–520 nm; melatonin is suppressed by blue ~460 nm. Our lenses filter those bands selectively.

Tint

The colour you see

Pink-rose for migraine comfort, amber / red / wine-red for evening & sleep, yellow for daytime screens, smoke grey-green for our deepest patented lens. The tint is a result of the filtration — not decoration.

Every Sleepaxa lens is available in zero power, prescription and progressive — with high-index options for low thickness, custom lens fit, and sizing from kids to adults.

Powered by NeuroCalm FLX+ · Patent No. 587746

Migraine & photophobia comfort.

Lenses that selectively calm the 480–520 nm blue–green band linked to migraine and light sensitivity — from an everyday pink-rose tint to our deepest patented smoke grey-green lens.

FL-41

Pink-rose tint · Indoor

Best for: mild-to-moderate light sensitivity, indoor lights and screens, all-day indoor wear.

Brightness (VLT)60%
  • TintPink-rose (light)
  • Blue–green 460–490 nmPasses ~16–19% (calmed)
  • WearIndoor
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Migraine & Photophobia comfort

FL-41 Darker

Darker pink tint · Indoor–outdoor

Best for: frequent or severe migraine & photophobia, bright, fluorescent or outdoor light.

Brightness (VLT)41%
  • TintDarker pink
  • Blue–green band~86% attenuated
  • WearIndoor–outdoor · UV400
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Migraine & Photophobia comfort

NeuroCalm FLX+

Smoke grey-green tint · Indoor–outdoor

Best for: the most intense light sensitivity — our deepest lens, built on the granted dual-band patent.

Brightness (VLT)22%
  • TintSmoke grey-green
  • ArchitectureDual-band · Patent 587746
  • WearIndoor–outdoor
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • AvailabilityThrough Sleepaxa consultation
Migraine & Photophobia comfort Consultation only · at present

Circadian560 · sub-560 nm science

Sleep & evening wind-down.

Amber, red and wine-red lenses that block the short wavelengths (up to ~500–560 nm) which suppress melatonin — for screens and lighting after sunset.

Amber Evening Sleep

Amber tint · Indoor–outdoor

Best for: evening screens, reading, TV — a lighter amber for the hours before bed.

Brightness (VLT)50%
  • TintAmber
  • Blue block (to ~500 nm)~100%
  • WearEvening · indoor–outdoor
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Evening wind-down

Red Sleep

Red tint · Indoor

Best for: the last hour before sleep and night waking — a deep circadian filter.

Brightness (VLT)15%
  • TintRed
  • Block below 560 nm100%
  • WearEvening / night · indoor
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Sleep

Circadian560

Wine red tint · Indoor only

Best for: serious sleep routines — maximum melanopic protection with a sub-560 nm cutoff.

Brightness (VLT)17%
  • TintWine red
  • Block below 560 nm100%
  • Application202521120977 (pending)
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Max protection

DayActive 1.0

Daytime, screens & office light.

Our next-level daytime lens: a high-HEV yellow filter that cuts harsh violet/blue glare from screens and office LED lighting — without dimming your view or dulling alertness.

DayActive 1.0

Yellow tint · Indoor–outdoor

Best for: long screen days, office / LED lighting, study and gaming — all-day daytime comfort, next-level high-HEV filtering.

Brightness (VLT)76%
  • TintYellow (light)
  • FiltersHigh HEV violet/blue & office glare
  • WearDaytime · indoor–outdoor · UV400
  • FitZero · Prescription · Progressive
  • High indexAvailable · low thickness
  • Custom · Kids–AdultAvailable
Daytime · office · gaming

In development

Coming soon.

A specialised lens on the way — available first through Sleepaxa consultation.

Chrome Assist Pro

Colour-contrast · near-neutral

Best for: red–green colour-contrast enhancement — a specialised optical aid, dispensed with professional guidance.

  • PurposeRed–green colour contrast
  • Notch~585 nm
  • Application202621061642 (pending)
  • FitZero power · Prescription
  • AvailabilityThrough Sleepaxa consultation
Coming soon

Side by side

The full comparison.

All lens values are from independent test reports (ISO 12312-1, AS/NZS 1067.1, ANSI Z80.3). Every lens: zero / prescription / progressive · high-index · custom · kids to adult.

Lens Use VLT Tint Filters Wear Availability
FL-41 Migraine / photophobia 60% Pink-rose Calms 480–520 nm Indoor Zero · Rx · Progressive
FL-41 Darker Severe migraine 41% Darker pink ~86% blue–green Indoor–outdoor Zero · Rx · Progressive
NeuroCalm FLX+ Extreme photophobia 22% Smoke grey-green Dual-band (Patent 587746) Indoor–outdoor Consultation only
Amber Evening Sleep Evening / sleep 50% Amber ~100% blue to ~500 nm Evening · indoor–outdoor Zero · Rx · Progressive
Red Sleep Night / sleep 15% Red 100% below 560 nm Indoor Zero · Rx · Progressive
Circadian560 Sleep (max) 17% Wine red 100% below 560 nm Indoor only Zero · Rx · Progressive
DayActive 1.0 Daytime / office / gaming 76% Yellow High HEV violet/blue + office glare Indoor–outdoor Zero · Rx · Progressive
Chrome Assist Pro Colour contrast 70% Near-neutral Notch ~585 nm All-day Coming soon · consultation

Quick guide

Which lens is right for you?

😵‍💫

Bright lights hurt / migraine

Screens and indoor lights feel too intense.

FL-41 / FL-41 Darker

😴

Late-night screens

You're on devices in the evening and want a better wind-down.

Amber Evening Sleep

🌙

Trouble sleeping

You want the deepest evening/night protection.

Red Sleep / Circadian560

💻

All-day screens / office / gaming

Long hours on screens and under office lights.

DayActive 1.0

Good to know

Frequently asked.

What does VLT mean?

Visible Light Transmission — the percentage of light the lens lets through. A 76% lens is very light (barely tinted); a 15% lens is very dark. Lower VLT = deeper filtering, which is why sleep/night lenses are darkest.

What is FL-41, and why pink-rose?

FL-41 is a rose-family tint studied for light sensitivity and migraine. It selectively reduces the blue–green band (around 480–520 nm) that many people find triggering, while keeping the rest of your vision natural. The pink-rose colour is simply the result of that filtration.

What is NeuroCalm FLX+, and why smoke grey-green?

NeuroCalm FLX+ is Sleepaxa's deepest, patented dual-band lens (Indian Patent No. 587746) for the most intense light sensitivity. Its dual-band architecture appears as a neutral smoke grey-green tint that preserves colour and traffic-signal recognition. It is currently available only through a Sleepaxa consultation.

Are prescription and progressive lenses available?

Yes — every Sleepaxa lens comes in zero power, single-vision prescription and progressive. High-index options are available for thinner, lighter lenses at higher powers, along with custom lens fit and sizing from kids to adults.

Amber vs Red vs Wine-red for sleep?

Amber (Evening Sleep, 50% VLT) is lighter, for the hours before bed and can be worn indoor–outdoor. Red Sleep (red, 15%) and Circadian560 (wine red, 17%) are deeper — blocking 100% of light below ~560 nm — for the last hour before sleep and night use. Circadian560 is indoor-only.

Can I wear these while driving?

DayActive, FL-41 Darker and NeuroCalm FLX+ preserve traffic-signal recognition and are suitable for daytime road use. Red Sleep and Circadian560 are for evening/indoor use only — not for driving.

Are these medical devices?

No. Sleepaxa lenses are assistive visual-comfort eyewear designed to support light management. They are not medical devices and are not a substitute for medical diagnosis or treatment — please consult a qualified professional for clinical concerns.

Research Source

The wavelength science and patents behind these lenses are developed and documented by Acieon Labs, the research & intellectual property division of Sleepaxa Private Limited. All optical values are from independent lab test reports. Explore the evidence: Science by Acieon Labs, Patent register, and Publications.

Assistive visual-comfort eyewear. Not a medical device. Not medical advice.