{"product_id":"shinu-fl41-anti-migraine-glasses-light-tint-fl-41-glasses-73-transmittance-cat-eye-tr90-glasses-with-fl41-filter-indoor-used","title":"SHINU FL41 Anti Migraine Glasses Light‑Tint FL‑41 Glasses 73% Transmittance Cat Eye TR90 Glasses with Fl41 Filter Indoor Used","description":"\u003cp class=\"word-break white-space mt-10\" style=\"font-size:13px;font-weight:normal;text-align:left;color:rgb(67, 70, 73)\" align=\"left\"\u003e\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size:24px;\"\u003e\u003cstrong\u003eFL‑41 lenses come in different tint depths for different user needs. For people with mild light sensitivity and high sensitivity to color distortion, lighter‑tint lenses are strongly preferred.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cspan style=\"font-size:24px;\"\u003e\u003cstrong\u003eOur SHINU FL41B lens is specially engineered for indoor‑only usage. It delivers 40% targeted blocking rate against problematic wavelengths, paired with 73% light transmittance. It provides effective relief from light‑triggered discomfort while minimizing color shift. Ideal for mild‑level photophobia, migraine‑related light sensitivity, long‑hour screen time and indoor fluorescent \/ LED lighting environments.\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e\u003cbr\u003e\n1. Why 480–520nm Light Irritates Eyes\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cspan style=\"font-size:24px\"\u003eHuman eyes have rods (night vision) and cones (color \u0026amp; detail).\u003cbr\u003e\nIn early 2000s, scientists found ipRGCs, a third light-sensing cell. It carries melanopsin, highly sensitive\u003cbr\u003e\nto 480–520nm cyan-green light. Too much light in this band triggers glare and eye discomfort from LEDs,\u003cbr\u003e\nfluorescent lights and sunlight.\u003c\/span\u003e\u003cbr\u003e\n\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e2. Where FL41 Comes From\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cspan style=\"font-size:24px\"\u003eFL41 stands for Fluorescent Light Formula 41, created in late 1980s by Professor Arnold Wilkins in Birmingham,\u003cbr\u003e\nUK. Old office fluorescent lights flicker invisibly with strong 480–520nm spectrum, causing eye strain for\u003cbr\u003e\nworkers. After many trials, his 41st rose-tint lens formula perfectly filters harsh fluorescent light, named FL-41.\u003c\/span\u003e\u003cbr\u003e\n\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e3. How FL41 Lenses Work\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cspan style=\"font-size:24px\"\u003eOriginally made for office eye fatigue relief.\u003cbr\u003e\nFL41 rose lenses block irritating 480–520nm cyan-green light and cut glare from screens, lamps and sun.\u003cbr\u003e\nDifferent from dark sunglasses, it stays transparent indoors without dim vision, also softens harsh outdoor\u003cbr\u003e\nlight for office, study and daily outdoor use.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cimg cke-id=\"img49\" referrerpolicy=\"no-referrer\" slate-data-type=\"image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S00e491b1f4aa4d3d8717262134a43cb8A.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width:100%;height:auto\" width=\"100%\" height=\"auto\"\u003e\u003c\/div\u003e \u003cdiv\u003e\u003cimg cke-id=\"img50\" referrerpolicy=\"no-referrer\" slate-data-type=\"image\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb42cfa184c4b424c8b198a07bdfa41afv.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width:800px;height:800px\" width=\"800px\" height=\"800px\"\u003e\u003c\/div\u003e \u003c\/div\u003e\n\n\u003cp class=\"word-break white-space mt-10\" style=\"font-size:13px;font-weight:normal;text-align:left;color:rgb(67, 70, 73)\" align=\"left\"\u003e\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e\u003cimg cke-id=\"img80\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sc8564bdb229b4dc69fc6407d6c41bdb3O.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width: 800px; height: 800px;\"\u003e\u003cbr\u003e\nC1 BLACK FRAME \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003cspan style=\"font-size:36px\"\u003e\u003cstrong\u003e\u003cdiv\u003e\u003cimg cke-id=\"img82\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S4b5218ca9bcd485098471f88d4749377W.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width: 800px; height: 800px;\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg cke-id=\"img83\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S7a15a304fb5d45d585536cf2a40f7562L.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width: 800px; height: 800px;\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cimg cke-id=\"img84\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S2c0ba301a32346f089fa8697ab9b3977Y.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width: 800px; height: 800px;\"\u003e\u003c\/div\u003e\n\u003cimg cke-id=\"img85\" referrerpolicy=\"no-referrer\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S1c9eb764dc0448cfb0ef31019103d8cfT.jpg?width=800\u0026amp;height=800\u0026amp;hash=1600\" style=\"width: 800px; 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