{"product_id":"barkley-black-fl-41-migraine-relief-glasses","title":"Barkley Black | FL-41 Migraine Relief Glasses","description":"\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display:ital@0;1\u0026amp;family=DM+Sans:wght@300;400;500;600\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n  :root {\n    --red: #C41C18;\n    --red-light: #f9e9e9;\n    --red-dark: #8b1210;\n    --text: #1a1a1a;\n    --muted: #555;\n    --border: rgba(196,28,24,0.15);\n    --bg: #faf8f7;\n    --surface: #ffffff;\n  }\n\n  body {\n    font-family: 'DM Sans', sans-serif;\n    background: var(--bg);\n    color: var(--text);\n    font-size: 15px;\n    line-height: 1.6;\n  }\n\n  .hero {\n    padding: 48px 28px 40px;\n    background: var(--surface);\n    border-bottom: 1px solid var(--border);\n    position: relative;\n    overflow: hidden;\n  }\n\n  .hero::before {\n    content: 'FL-41';\n    position: absolute;\n    right: -12px;\n    top: -18px;\n    font-family: 'DM Serif Display', serif;\n    font-size: 130px;\n    color: rgba(196,28,24,0.055);\n    pointer-events: none;\n    user-select: none;\n    line-height: 1;\n    letter-spacing: -4px;\n  }\n\n  .hero-eyebrow {\n    font-size: 11px;\n    font-weight: 600;\n    letter-spacing: 3px;\n    text-transform: uppercase;\n    color: var(--red);\n    margin-bottom: 12px;\n  }\n\n  .hero h1 {\n    font-family: 'DM Serif Display', serif;\n    font-size: 46px;\n    line-height: 1.0;\n    letter-spacing: -0.5px;\n    color: var(--text);\n    margin-bottom: 6px;\n  }\n\n  .hero h1 em {\n    font-style: italic;\n    color: var(--red);\n  }\n\n  .hero-sub {\n    font-size: 16px;\n    color: var(--muted);\n    margin-top: 10px;\n    max-width: 380px;\n    line-height: 1.55;\n  }\n\n  .badge-row {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 8px;\n    margin-top: 22px;\n  }\n\n  .badge {\n    font-size: 11px;\n    font-weight: 600;\n    letter-spacing: 0.5px;\n    padding: 5px 12px;\n    border-radius: 100px;\n    border: 1px solid var(--border);\n    color: var(--red-dark);\n    background: var(--red-light);\n  }\n\n  .intro-strip {\n    background: var(--red);\n    color: #fff;\n    padding: 22px 28px;\n    font-size: 15px;\n    line-height: 1.65;\n  }\n\n  .intro-strip strong { font-weight: 600; }\n\n  .section {\n    padding: 28px 28px;\n    background: var(--surface);\n    border-bottom: 1px solid var(--border);\n  }\n\n  .section:nth-child(even) {\n    background: var(--bg);\n  }\n\n  .section-label {\n    font-size: 10px;\n    font-weight: 600;\n    letter-spacing: 2.5px;\n    text-transform: uppercase;\n    color: var(--red);\n    margin-bottom: 10px;\n  }\n\n  .section h2 {\n    font-family: 'DM Serif Display', serif;\n    font-size: 26px;\n    line-height: 1.15;\n    margin-bottom: 12px;\n    color: var(--text);\n  }\n\n  .section p {\n    color: var(--muted);\n    font-size: 14.5px;\n    line-height: 1.7;\n    margin-bottom: 10px;\n  }\n\n  .section p:last-child { margin-bottom: 0; }\n\n  .stat-trio {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    gap: 1px;\n    background: var(--border);\n    border: 1px solid var(--border);\n    border-radius: 12px;\n    overflow: hidden;\n    margin: 24px 0;\n  }\n\n  .stat-cell {\n    background: var(--surface);\n    padding: 20px 16px;\n    text-align: center;\n  }\n\n  .stat-cell .num {\n    font-family: 'DM Serif Display', serif;\n    font-size: 36px;\n    color: var(--red);\n    line-height: 1;\n    display: block;\n  }\n\n  .stat-cell .lbl {\n    font-size: 11.5px;\n    color: var(--muted);\n    margin-top: 5px;\n    line-height: 1.4;\n  }\n\n  .wavelength-bar {\n    margin: 20px 0 0;\n    border-radius: 8px;\n    overflow: hidden;\n    height: 14px;\n    background: linear-gradient(\n      to right,\n      #6a0dad 0%,\n      #4169e1 12%,\n      #1e90ff 22%,\n      #00bfff 32%,\n      #00ced1 42%,\n      #32cd32 52%,\n      #adff2f 62%,\n      #ffd700 72%,\n      #ff8c00 82%,\n      #ff0000 92%,\n      #8b0000 100%\n    );\n    position: relative;\n  }\n\n  .filter-overlay {\n    position: absolute;\n    left: 32%;\n    width: 16%;\n    top: 0;\n    height: 100%;\n    background: rgba(196,28,24,0.45);\n    border-left: 2px solid var(--red);\n    border-right: 2px solid var(--red);\n  }\n\n  .wavelength-labels {\n    display: flex;\n    justify-content: space-between;\n    font-size: 11px;\n    color: var(--muted);\n    margin-top: 5px;\n  }\n\n  .filter-label {\n    font-size: 11.5px;\n    color: var(--red);\n    font-weight: 600;\n    text-align: center;\n    margin-top: 2px;\n  }\n\n  .use-grid {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 10px;\n    margin-top: 16px;\n  }\n\n  .use-item {\n    display: flex;\n    align-items: flex-start;\n    gap: 10px;\n    padding: 14px;\n    border: 1px solid var(--border);\n    border-radius: 10px;\n    background: var(--surface);\n  }\n\n  .use-dot {\n    width: 8px;\n    height: 8px;\n    border-radius: 50%;\n    background: var(--red);\n    flex-shrink: 0;\n    margin-top: 5px;\n  }\n\n  .use-item span {\n    font-size: 13.5px;\n    color: var(--text);\n    line-height: 1.45;\n  }\n\n  .condition-list {\n    display: flex;\n    flex-direction: column;\n    gap: 8px;\n    margin-top: 14px;\n  }\n\n  .condition-item {\n    padding: 12px 16px;\n    border-left: 3px solid var(--red);\n    background: var(--red-light);\n    border-radius: 0 8px 8px 0;\n    font-size: 14px;\n    color: var(--text);\n    line-height: 1.5;\n  }\n\n  .condition-item strong {\n    display: block;\n    font-weight: 600;\n    color: var(--red-dark);\n    margin-bottom: 2px;\n  }\n\n  .standards-grid {\n    display: grid;\n    grid-template-columns: 1fr 1fr 1fr;\n    gap: 10px;\n    margin-top: 16px;\n  }\n\n  .std-card {\n    padding: 16px 14px;\n    background: var(--surface);\n    border: 1px solid var(--border);\n    border-radius: 10px;\n    text-align: center;\n  }\n\n  .std-card .std-name {\n    font-size: 11px;\n    font-weight: 700;\n    letter-spacing: 0.5px;\n    color: var(--red);\n    margin-bottom: 6px;\n  }\n\n  .std-card .std-desc {\n    font-size: 11.5px;\n    color: var(--muted);\n    line-height: 1.4;\n  }\n\n  .pass-pill {\n    display: inline-block;\n    background: #e9f7ee;\n    color: #1a6b36;\n    font-size: 10px;\n    font-weight: 700;\n    letter-spacing: 1px;\n    padding: 3px 9px;\n    border-radius: 100px;\n    margin-top: 8px;\n    border: 1px solid #a8d9b8;\n  }\n\n  .spec-table {\n    width: 100%;\n    border-collapse: collapse;\n    margin-top: 14px;\n    font-size: 13.5px;\n  }\n\n  .spec-table tr {\n    border-bottom: 1px solid var(--border);\n  }\n\n  .spec-table tr:last-child { border-bottom: none; }\n\n  .spec-table td {\n    padding: 10px 4px;\n    vertical-align: top;\n  }\n\n  .spec-table td:first-child {\n    color: var(--muted);\n    width: 48%;\n    font-size: 13px;\n  }\n\n  .spec-table td:last-child {\n    font-weight: 500;\n    color: var(--text);\n  }\n\n  .closing {\n    background: var(--red);\n    color: #fff;\n    padding: 36px 28px;\n    text-align: center;\n  }\n\n  .closing h2 {\n    font-family: 'DM Serif Display', serif;\n    font-size: 32px;\n    line-height: 1.1;\n    margin-bottom: 12px;\n  }\n\n  .closing p {\n    font-size: 14.5px;\n    color: rgba(255,255,255,0.85);\n    max-width: 340px;\n    margin: 0 auto 20px;\n    line-height: 1.65;\n  }\n\n  .shipping-note {\n    font-size: 12.5px;\n    color: rgba(255,255,255,0.65);\n    margin-top: 14px;\n    border-top: 1px solid rgba(255,255,255,0.2);\n    padding-top: 14px;\n  }\n\n  @media (max-width: 500px) {\n    .hero h1 { font-size: 34px; }\n    .stat-trio { grid-template-columns: 1fr; }\n    .use-grid { grid-template-columns: 1fr; }\n    .standards-grid { grid-template-columns: 1fr; }\n    .hero::before { font-size: 80px; }\n  }\n\u003c\/style\u003e\n\u003c!-- HERO --\u003e\n\u003cdiv class=\"hero\"\u003e\n\u003cdiv class=\"hero-eyebrow\"\u003eOKNO — Specialized Light Therapy Eyewear\u003c\/div\u003e\n\u003ch1\u003eFL-41\u003cbr\u003e\u003cem\u003eMigraine Relief\u003c\/em\u003e\u003cbr\u003eGlasses\u003c\/h1\u003e\n\u003cp class=\"hero-sub\"\u003eTherapeutic-grade lenses engineered to filter the specific light wavelengths most commonly linked to migraines, photophobia, and light-triggered headaches.\u003c\/p\u003e\n\u003cdiv class=\"badge-row\"\u003e\n\u003cdiv class=\"badge\"\u003ePhotophobia Relief\u003c\/div\u003e\n\u003cdiv class=\"badge\"\u003eMigraine Support\u003c\/div\u003e\n\u003cdiv class=\"badge\"\u003ePost-Concussion\u003c\/div\u003e\n\u003cdiv class=\"badge\"\u003eDigital Eye Strain\u003c\/div\u003e\n\u003cdiv class=\"badge\"\u003eIndoor \u0026amp; Outdoor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- INTRO STRIP --\u003e\n\u003cdiv class=\"intro-strip\"\u003e\n\u003cstrong\u003eWhat are FL-41 lenses?\u003c\/strong\u003e FL-41 is a specialized tint applied to lenses, scientifically proven to block specific wavelengths of light that trigger eye pain, dizziness, and headaches. These lenses are widely used as a therapeutic tool for people managing \u003cstrong\u003ephotophobia, post-concussion syndrome, and migraine relief\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c!-- WHY IT WORKS --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eThe Science\u003c\/div\u003e\n\u003ch2\u003eWhy FL-41 Works\u003c\/h2\u003e\n\u003cdiv style=\"margin-top: 4px;\" class=\"condition-list\"\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003eBlue-Green Light Blocking\u003c\/strong\u003e These lenses filter out a significant portion of blue and green light — specifically in the 480–520 nm range — which are the most common wavelengths to trigger light sensitivity, eye pain, and headaches.\u003c\/div\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003eSoothes Fluorescent \u0026amp; Screen Glare\u003c\/strong\u003e Originally developed by researchers to mitigate the harsh, flickering glare of fluorescent lights in office settings and from computer screens — some of the most persistent everyday triggers for photosensitive individuals.\u003c\/div\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003eReduces Symptom Frequency\u003c\/strong\u003e Clinical studies have shown that FL-41 filters can significantly reduce the frequency and severity of migraines in people who experience light-triggered episodes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 20px;\" class=\"wavelength-bar\"\u003e\n\u003cdiv class=\"filter-overlay\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wavelength-labels\"\u003e\n\u003cspan\u003e380 nm\u003c\/span\u003e \u003cspan\u003e500 nm\u003c\/span\u003e \u003cspan\u003e700 nm\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"filter-label\"\u003e▲ Targeted filtering zone: 480–520 nm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- STATS --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eClinical Evidence\u003c\/div\u003e\n\u003ch2\u003eWhat Studies Have Found\u003c\/h2\u003e\n\u003cp\u003eClinical studies examining FL-41 filters have reported meaningful improvements in migraine frequency and light-triggered discomfort for photosensitive individuals.\u003c\/p\u003e\n\u003cdiv class=\"stat-trio\"\u003e\n\u003cdiv class=\"stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e74%\u003c\/span\u003e\n\u003cdiv class=\"lbl\"\u003efewer migraine attacks reported in studies\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e76%\u003c\/span\u003e\n\u003cdiv class=\"lbl\"\u003eimprovement in light-triggered discomfort\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"stat-cell\"\u003e\n\u003cspan class=\"num\"\u003e80%+\u003c\/span\u003e\n\u003cdiv class=\"lbl\"\u003ereduced overall headache impact reported\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size: 12.5px; color: var(--muted); margin-top: -8px;\"\u003eResults vary by individual. These figures are based on observational clinical studies involving FL-41 lens filters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- WHO IT HELPS --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eWho It's For\u003c\/div\u003e\n\u003ch2\u003eConditions It May Help With\u003c\/h2\u003e\n\u003cdiv class=\"condition-list\"\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003eChronic Migraines\u003c\/strong\u003e May help reduce discomfort from light-triggered migraine episodes during everyday activities.\u003c\/div\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003ePhotophobia (Light Sensitivity)\u003c\/strong\u003e Designed to ease persistent sensitivity to bright or artificial light sources.\u003c\/div\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003ePost-Concussion Syndrome\u003c\/strong\u003e Widely used as supportive eyewear for those experiencing light sensitivity following a concussion.\u003c\/div\u003e\n\u003cdiv class=\"condition-item\"\u003e\n\u003cstrong\u003eDigital Eye Strain\u003c\/strong\u003e Helps reduce discomfort from prolonged screen exposure, LED lighting, and fluorescent environments.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- WHEN TO WEAR --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eEveryday Use\u003c\/div\u003e\n\u003ch2\u003eWhen to Wear Them\u003c\/h2\u003e\n\u003cp\u003eDesigned for all-day comfort — suitable for both indoor and outdoor environments.\u003c\/p\u003e\n\u003cdiv class=\"use-grid\"\u003e\n\u003cdiv class=\"use-item\"\u003e\n\u003cdiv class=\"use-dot\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003eDuring screen time \u0026amp; computer use\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"use-item\"\u003e\n\u003cdiv class=\"use-dot\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003eUnder fluorescent \u0026amp; LED lighting\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"use-item\"\u003e\n\u003cdiv class=\"use-dot\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003eIn bright sunlight \u0026amp; outdoor glare\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"use-item\"\u003e\n\u003cdiv class=\"use-dot\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cspan\u003eIn offices \u0026amp; indoor workspaces\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- CERTIFICATIONS --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eIndependently Certified\u003c\/div\u003e\n\u003ch2\u003eInternationally Tested \u0026amp; Certified\u003c\/h2\u003e\n\u003cp\u003eEvery lens is independently tested. These lenses have passed all major international eyewear safety standards.\u003c\/p\u003e\n\u003cdiv class=\"standards-grid\"\u003e\n\u003cdiv class=\"std-card\"\u003e\n\u003cdiv class=\"std-name\"\u003eEN ISO 12312-1:2022\u003c\/div\u003e\n\u003cdiv class=\"std-desc\"\u003eEuropean International Eye Protector Standard\u003c\/div\u003e\n\u003cdiv class=\"pass-pill\"\u003eCERTIFIED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"std-card\"\u003e\n\u003cdiv class=\"std-name\"\u003eANSI Z80.3:2018\u003c\/div\u003e\n\u003cdiv class=\"std-desc\"\u003eAmerican National Standard for Nonprescription Eyewear\u003c\/div\u003e\n\u003cdiv class=\"pass-pill\"\u003eCERTIFIED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"std-card\"\u003e\n\u003cdiv class=\"std-name\"\u003eAS\/NZS 1067.1:2016\u003c\/div\u003e\n\u003cdiv class=\"std-desc\"\u003eAustralian \u0026amp; New Zealand Sun Protective Eyewear Standard\u003c\/div\u003e\n\u003cdiv class=\"pass-pill\"\u003eCERTIFIED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- PRODUCT SPECS --\u003e\n\u003cdiv class=\"section\"\u003e\n\u003cdiv class=\"section-label\"\u003eProduct Details\u003c\/div\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eLens tint\u003c\/td\u003e\n\u003ctd\u003eRed FL-41 therapeutic tint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter zone\u003c\/td\u003e\n\u003ctd\u003eBlue-green light band (480–520 nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003eUnisex, ultra-lightweight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSuitable for\u003c\/td\u003e\n\u003ctd\u003eIndoor \u0026amp; outdoor, daytime use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTint note\u003c\/td\u003e\n\u003ctd\u003eShade may vary slightly from product images due to lighting and production variation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c!-- CLOSING --\u003e\n\u003cdiv class=\"closing\"\u003e\n\u003ch2\u003eBlock the Trigger.\u003cbr\u003eFeel the Relief.\u003c\/h2\u003e\n\u003cp\u003eUnlike ordinary blue-light glasses, FL-41 lenses are a clinically recognised therapeutic tint — engineered to selectively filter the wavelengths that matter most for migraine and light-sensitivity sufferers.\u003c\/p\u003e\n\u003cdiv class=\"shipping-note\"\u003eDispatch within 5 working days from order date.\u003c\/div\u003e\n\u003c\/div\u003e","brand":"OKNO Unwynd","offers":[{"title":"Zero Power","offer_id":46694865109182,"sku":"BarkleyBlackFL-1","price":1699.0,"currency_code":"INR","in_stock":true},{"title":"Prescription Lens","offer_id":46694865141950,"sku":"BarkleyBlackFL-2","price":2599.0,"currency_code":"INR","in_stock":true},{"title":"Progressive Lens","offer_id":46694865174718,"sku":"BarkleyBlackFL-3","price":5599.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2570\/3440\/files\/1_c6434623-6ce5-40c2-b5dd-21cbdb8176bf.png?v=1778924910","url":"https:\/\/www.eyewearlabs.com\/products\/barkley-black-fl-41-migraine-relief-glasses","provider":"Eyewearlabs","version":"1.0","type":"link"}