{"product_id":"harmony-rose-fl-41-merritt-migraine-glasses-black","title":"Harmony Rose FL-41 Merritt Migraine Glasses – Black","description":"\u003cp\u003eA rose FL-41 tint in our black Merritt frame, for people who find ordinary indoor lighting hard work.\u003c\/p\u003e\n\n\u003cp\u003eFL-41 does something different from our sleep lenses. Rather than darkening everything, it takes out a narrow band between 480 and 520nm — the part of the spectrum most associated with discomfort under fluorescent and LED lighting — and leaves the rest bright. Independently lab-tested at 48% filtering across that band with 67.6% visible light transmission, it's a Category 1 lens you can wear indoors all day rather than only in the evening. Not a lens for driving after dark.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eA note on what this is and isn't.\u003c\/strong\u003e FL-41 tints have been used for light sensitivity for decades and there is real clinical literature behind them, but these are not a medical device and not a treatment. If you have persistent headaches or changes in your vision, please see an optometrist or a doctor — a tinted lens is not a substitute for that appointment.\u003c\/p\u003e","brand":"Blue Light Glasses by Sleep ZM","offers":[{"title":"Default Title","offer_id":48136959295572,"sku":"Wayfarer FL-41 Rose","price":49.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/3805\/7044\/files\/ns_0000_wayfarerrose14.jpg?v=1794171936","url":"https:\/\/humanhangover.com\/products\/harmony-rose-fl-41-merritt-migraine-glasses-black","provider":"Human Hangover®","version":"1.0","type":"link"}