{"product_id":"tr90-sport-reading-glasses-men-ultralight-anti-blue-light-presbyopia-eyeglasses-mens-hyperopia-optical-eyewear-diopters","title":"Calena SHIELD Anti Blue Light TR90 Reading Glasses","description":"\u003cp\u003ePart reading glasses, part screen-fatigue armor, part \u003cem\u003e'why have my evenings felt so harsh?'\u003c\/em\u003e The Calena SHIELD is a TR90 ultralight reading glass with anti-blue-light coating — built for late-evening readers and screen-heavy workers who want to protect their sleep without giving up their book or their inbox.\u003c\/p\u003e\n\n\u003ch2\u003eBuilt for restorative evenings\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eANTI-BLUE-LIGHT COATING:\u003c\/strong\u003e Filters the high-energy blue wavelengths that screens emit most intensely — the same wavelengths that suppress melatonin and disrupt sleep readiness when looked at in the evening.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTR90 ULTRALIGHT FRAME:\u003c\/strong\u003e Premium TR90 (Swiss-engineered polymer) frame is durable, flexible, and significantly lighter than acetate or metal frames — wearable for hours without temple fatigue.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRECTANGULAR PROFESSIONAL STYLE:\u003c\/strong\u003e Classic rectangle frame in 4 color options — works for daytime professional wear and evening reading without standing out as \"blue-light glasses\".\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEVEN PRESCRIPTION DIOPTERS:\u003c\/strong\u003e +1.00, +1.50, +2.00, +2.50, +3.00, +3.50, +4.00. Standard reader prescriptions — consult your optometrist for the right strength.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNISEX FIT:\u003c\/strong\u003e Designed for men and women, comfortable across face sizes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMade for\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eEvening screen workers.\u003c\/strong\u003e Two hours of evening screen use measurably suppresses melatonin. Filtering the blue spectrum mitigates the effect.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eLate-evening readers.\u003c\/strong\u003e Kindle, tablet, phone screens in the hour before bed have the strongest sleep-disruption effect. The SHIELD filters them.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eAnyone over 40 needing readers.\u003c\/strong\u003e Combine reading correction with blue-light protection — no need to buy and switch between two pairs.\u003c\/td\u003e\u003c\/tr\u003e\n  \u003ctr\u003e\u003ctd\u003e\n\u003cstrong\u003eMigraine and eye-strain sufferers.\u003c\/strong\u003e Blue-light filtering reduces the headache-trigger effect that some people experience from extended screen use.\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrame material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTR90 ultralight polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLens coating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnti-blue-light\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStyle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRectangle, professional\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrame colors\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOnyx (C1), Tortoise (C2), Slate (C3), Bone (C4)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiopter options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+1.00 \/ +1.50 \/ +2.00 \/ +2.50 \/ +3.00 \/ +3.50 \/ +4.00\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGender\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnisex\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSamjune (white-label by Calena)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eFrequently asked\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003e\u003cstrong\u003eHow much blue light do they filter?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe anti-blue-light coating filters a meaningful portion of the high-energy blue spectrum. They don't appear yellow-tinted, but a lens-testing flashlight shows the filter clearly.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eAre they prescription quality?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThese are reader-grade (preset diopters), not custom prescriptions. For full prescription correction, see your optometrist.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eHow do I pick the right diopter?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eMost people in their 40s use +1.00 to +2.00; 50s use +2.00 to +3.00; 60s+ use +2.50 to +4.00. Your optometrist can confirm exactly.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eAre they comfortable for long sessions?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eThe TR90 frame is one of the lightest plastic frames available — designed for multi-hour wear without temple pain.\u003c\/dd\u003e\n  \u003cdt\u003e\u003cstrong\u003eWhat if I don't love them?\u003c\/strong\u003e\u003c\/dt\u003e\n  \u003cdd\u003eReturn within 60 nights. 60-Night Drift Trial, full refund, no questions asked.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eThe 60-Night Drift Trial\u003c\/h2\u003e\n\u003cp\u003eWear the SHIELD for 60 evenings. If your sleep or eye fatigue isn't measurably better, send them back — no questions asked.\u003c\/p\u003e","brand":"Calena","offers":[{"title":"Slate (C3) \/ +350","offer_id":48546284372123,"sku":"200006449:200660894;71:175#C3","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +350","offer_id":48546284404891,"sku":"200006449:200660894;71:10#C4","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +400","offer_id":48546284437659,"sku":"200006449:200660895;71:193#C1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +400","offer_id":48546284470427,"sku":"200006449:200660895;71:29#C2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +300","offer_id":48546284503195,"sku":"200006449:200660893;71:175#C3","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +300","offer_id":48546284535963,"sku":"200006449:200660893;71:10#C4","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +350","offer_id":48546284568731,"sku":"200006449:200660894;71:193#C1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +350","offer_id":48546284601499,"sku":"200006449:200660894;71:29#C2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +400","offer_id":48546284634267,"sku":"200006449:200660895;71:175#C3","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +400","offer_id":48546284667035,"sku":"200006449:200660895;71:10#C4","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +150","offer_id":48546284699803,"sku":"200006449:200660890;71:175#C3","price":2.05,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +150","offer_id":48546284732571,"sku":"200006449:200660890;71:10#C4","price":2.1,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +200","offer_id":48546284765339,"sku":"200006449:200660891;71:193#C1","price":2.1,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +200","offer_id":48546284798107,"sku":"200006449:200660891;71:29#C2","price":2.09,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +100","offer_id":48546284830875,"sku":"200006449:200660889;71:175#C3","price":2.09,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +100","offer_id":48546284863643,"sku":"200006449:200660889;71:10#C4","price":2.09,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +150","offer_id":48546284896411,"sku":"200006449:200660890;71:193#C1","price":2.1,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +150","offer_id":48546284929179,"sku":"200006449:200660890;71:29#C2","price":2.09,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +250","offer_id":48546284961947,"sku":"200006449:200660892;71:175#C3","price":2.05,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +250","offer_id":48546284994715,"sku":"200006449:200660892;71:10#C4","price":2.1,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +300","offer_id":48546285027483,"sku":"200006449:200660893;71:193#C1","price":2.13,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +300","offer_id":48546285060251,"sku":"200006449:200660893;71:29#C2","price":2.16,"currency_code":"USD","in_stock":true},{"title":"Slate (C3) \/ +200","offer_id":48546285093019,"sku":"200006449:200660891;71:175#C3","price":2.05,"currency_code":"USD","in_stock":true},{"title":"Bone (C4) \/ +200","offer_id":48546285125787,"sku":"200006449:200660891;71:10#C4","price":2.11,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +250","offer_id":48546285158555,"sku":"200006449:200660892;71:193#C1","price":2.11,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +250","offer_id":48546285191323,"sku":"200006449:200660892;71:29#C2","price":2.12,"currency_code":"USD","in_stock":true},{"title":"Onyx (C1) \/ +100","offer_id":48546285224091,"sku":"200006449:200660889;71:193#C1","price":2.1,"currency_code":"USD","in_stock":true},{"title":"Tortoise (C2) \/ +100","offer_id":48546285256859,"sku":"200006449:200660889;71:29#C2","price":2.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0763\/0923\/3819\/files\/S55c2ae503b5c462e938e24773a80fc33N.webp?v=1778535941","url":"https:\/\/calena-6.myshopify.com\/products\/tr90-sport-reading-glasses-men-ultralight-anti-blue-light-presbyopia-eyeglasses-mens-hyperopia-optical-eyewear-diopters","provider":"Calena","version":"1.0","type":"link"}