Sleepaxa Research Hub | Photobiology & Optical Science

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What causes photophobia: 94 conditions across 7 categories, with a 0 to 3 photophobia severity scale
Photophobia Causes A to Z: 94 Eye, Neurological and Genetic Conditions, Graded by Severity (2026)
FL-41 vs clear blue-cut vs dark sunglasses: what each lens filters across the visible spectrum
FL-41 vs Blue-Light Glasses vs Sunglasses: Which Works for Tube Lights, Screens and Driving?
Sleepaxa prescription FL-41 lens options from zero power to progressive, with the anti-reflective and hydrophobic coating stack
Prescription, Progressive & Zero-Power FL-41 Glasses in India: Lens Options, Coatings and Prices
Timeline of FL-41 research for migraine and light sensitivity, 1991 to 2024
Do FL-41 Glasses Really Work for Migraine and Light Sensitivity? What the Research Says
Sleepaxa vs Noctix vs Okno FL-41 migraine glasses comparison table: tints, frames, progressive, high-index, standards, patents
Sleepaxa vs Noctix vs Okno: Best FL-41 Migraine Glasses in India (2026)

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What causes photophobia: 94 conditions across 7 categories, with a 0 to 3 photophobia severity scale
Research

Photophobia Causes A to Z: 94 Eye, Neurological and Genetic Conditions, Graded by Severity (2026)

Quick answer: Photophobia — discomfort or pain from light — is a symptom, not a disease. Over 90 conditions can cause it. The most common are...

Oct 23 2026
Post by Suraj Dubey
FL-41 vs clear blue-cut vs dark sunglasses: what each lens filters across the visible spectrum
Research

FL-41 vs Blue-Light Glasses vs Sunglasses: Which Works for Tube Lights, Screens and Driving?

Quick answer: For headaches and discomfort under tube lights, LED panels and screens, FL-41 is the better choice: it filters the 480–520 nm blue-green band linked...

Oct 23 2026
Post by Suraj Dubey
Sleepaxa prescription FL-41 lens options from zero power to progressive, with the anti-reflective and hydrophobic coating stack
Research

Prescription, Progressive & Zero-Power FL-41 Glasses in India: Lens Options, Coatings and Prices

Quick answer: If you wear glasses, your FL-41 tint should be built into your prescription lens — not clipped on top. Sleepaxa makes FL-41 Light and...

Oct 23 2026
Post by Suraj Dubey
Timeline of FL-41 research for migraine and light sensitivity, 1991 to 2024
Research

Do FL-41 Glasses Really Work for Migraine and Light Sensitivity? What the Research Says

Quick answer: Yes, for many people with light-triggered symptoms — but not for everyone, and not as a cure. FL-41 is the most-studied tint for migraine...

Oct 23 2026
Post by Suraj Dubey
Sleepaxa vs Noctix vs Okno FL-41 migraine glasses comparison table: tints, frames, progressive, high-index, standards, patents
Research

Sleepaxa vs Noctix vs Okno: Best FL-41 Migraine Glasses in India (2026)

Quick answer: All three brands sell rose-tinted FL-41 glasses in India. Okno has the lowest listed price. Noctix offers a 30-day money-back guarantee and a fit-over...

Oct 23 2026
Post by Suraj Dubey
FL-41 glasses explained: Sleepaxa FL-41 Dark transmittance curve across 400–700 nm, with the 480–520 nm target band
Research

FL-41 Glasses in India: The Complete 2026 Guide

Quick answer: FL-41 glasses use a rose-coloured tint that selectively filters blue-green light around 480–520 nm — the band many people with migraine and light sensitivity...

Oct 23 2026
Post by Suraj Dubey
How Sleepaxa Earns Optical Lens Patents Where Most Eyewear Brands Don't
Research

How Sleepaxa Earns Optical Lens Patents Where Most Eyewear Brands Don't

By Suraj Dubey — Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited · Last updated: July 2026 Disclaimer: Educational content about product development and...

Jul 05 2026
Post by Suraj Dubey
Generic Yellow Tint vs Sleepaxa DayActive: Daytime Screen Glasses
Research

Generic Yellow Tint vs Sleepaxa DayActive: Daytime Screen Glasses

By Suraj Dubey — Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited · Last updated: July 2026 Disclaimer: Educational content, not medical advice. DayActive...

Jul 05 2026
Post by Suraj Dubey
FL-41 vs NeuroCalm FLX+: Single-Band vs Dual-Band Migraine Lenses
Research

FL-41 vs NeuroCalm FLX+: Single-Band vs Dual-Band Migraine Lenses

By Suraj Dubey — Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited · Last updated: July 2026 Disclaimer: Educational content, not medical advice. FL-41...

Jul 05 2026
Post by Suraj Dubey
Amber vs Red vs Circadian560 Sleep Glasses: Which to Choose
Research

Amber vs Red vs Circadian560 Sleep Glasses: Which to Choose

By Suraj Dubey — Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited · Last updated: July 2026 Disclaimer: Educational content, not medical advice. Sleepaxa...

Jul 05 2026
Post by Suraj Dubey
Are Blue Light Glasses a Scam? The Honest Truth (2026)
Research

Are Blue Light Glasses a Scam? The Honest Truth (2026)

By Suraj Dubey — Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited · Last updated: July 2026 Disclaimer: Educational content only, not medical advice....

Jul 05 2026
Post by Suraj Dubey
India's Most Innovative Eyewear Company 2026: 6 Patents, 9 Papers
Research

India's Most Innovative Eyewear Company 2026: 6 Patents, 9 Papers

By Suraj Dubey | Senior Optometrist, Founder & Head of R&D, Sleepaxa Private Limited Last updated: April 2026 Disclaimer: This article is for educational purposes only....

May 11 2026
Post by Suraj Dubey