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 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