{"product_id":"the-corridor-photochromic-progressive-lenses","title":"The Corridor | Photochromic Anti-Blue Progressive Lenses, UV400 with HMC Coating","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003eA progressive lens is not one lens. It is several prescriptions blended across a single surface, and the invisible part is the corridor, the channel that carries the reading zone down from the distance zone. Nobody sees it. Everybody notices when it is wrong, and the usual complaint is not blur but a floor that seems to tilt.\u003c\/p\u003e\n\u003cp\u003eThese lenses are cut from CR-39 resin with a corridor that can be specified at 9, 11, 13, or 15 millimetres, with 11 millimetres as the standard. Corridor length decides how much head movement the wearer accepts: a shorter corridor suits a shallow frame and a habitual reader, a longer one spreads the zones for a taller lens and a wearer who moves between near and far all day. On top of the optical design the lens carries several coatings at once: a hard coat, an anti-reflective layer, an HMC broadband coating, UV400 filtration, and a blue light filter for screen work. The photochromic layer does the rest, staying clear indoors and darkening outdoors as ultraviolet light rises.\u003c\/p\u003e\n\u003cp\u003eThere is one thing to understand before ordering. This is a lens blank service, not a finished pair of glasses. You supply your prescription and choose the index, diameter, and corridor, and the lenses arrive ready for a frame. Higher index means a thinner lens for a strong prescription, and CR-39 remains the sharpest of the common materials for the money. If the numbers are entered correctly, the pair that comes back from your optician is the pair you specified.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThe frame gets the compliments. The lens gets the vision.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #eeeeee;\"\u003e\n\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style: none; padding: 0;\"\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e Progressive corridor available in 9, 11, 13, and 15 millimetres, with 11 millimetres standard.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e Photochromic layer stays clear indoors and darkens in outdoor ultraviolet light.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e UV400 filtration blocks the full ultraviolet range.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e Anti-blue light filter reduces screen glare for desk and phone work.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e HMC broadband coating with anti-reflective, hard coat, and EMI layers.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e CR-39 resin in 1.56, 1.61, and 1.67 index for a thinner lens at higher prescriptions.\u003c\/li\u003e\n\u003cli style=\"padding: 10px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e✦\u003c\/strong\u003e Supplied as lens pairs, ready for your own frame.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-specs\" style=\"margin-top: 30px;\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style: none; padding: 0;\"\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e BCLEAR\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e CR-39 resin\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Progressive, photochromic, anti-blue light\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSphere Range:\u003c\/strong\u003e +8.00 to -10.00\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCylinder Range:\u003c\/strong\u003e 0.00 to -4.00\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eAddition Range:\u003c\/strong\u003e +0.50 to +4.00\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eRefractive Index:\u003c\/strong\u003e 1.56, 1.61, 1.67\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 65 mm, 70 mm, 75 mm\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCorridor:\u003c\/strong\u003e 9 mm, 11 mm (standard), 13 mm, 15 mm\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCoatings:\u003c\/strong\u003e HMC, anti-reflective, hard coat, EMI\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eUV Protection:\u003c\/strong\u003e UV400\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003ePhotochromic Colour:\u003c\/strong\u003e Grey or brown in daylight, clear indoors\u003c\/li\u003e\n\u003cli style=\"padding: 9px 0; border-bottom: 1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-applications\" style=\"margin-top: 30px;\"\u003e\n\u003ch3\u003eWhere It Belongs\u003c\/h3\u003e\n\u003cp\u003eWearers who move between near and far all day and want one pair instead of two; office workers who want blue light filtering and outdoor tinting without swapping glasses at the door; high prescriptions where a 1.61 or 1.67 index keeps the edge thickness down; and opticians or customers ordering lens pairs to fit a frame they already own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq\" style=\"margin-top: 30px;\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom: 16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to send my prescription?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Progressive lenses are cut to your sphere, cylinder, addition, and pupillary distance. Ordering without a current prescription will not produce a usable lens, so have your optician's numbers ready.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What does the corridor length change?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe corridor is the channel between the distance and reading zones. A shorter corridor suits a shallower frame with less head movement, while a longer corridor spreads the zones across a taller lens. Most wearers are comfortable at 11 millimetres.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How dark do the lenses go outside?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe photochromic layer darkens in response to ultraviolet light, reaching a grey or brown tint in direct sun and returning to clear indoors and in a car, where windscreen glass filters much of the ultraviolet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which index should I choose?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIndex relates to thickness, not prescription strength. A 1.56 lens suits lower powers, while 1.61 and 1.67 keep a strong prescription from looking thick at the edge. CR-39 at 1.56 remains the sharpest option for lower powers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom: 16px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are the lenses compatible with any frame?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThey arrive as uncut or semi finished pairs sized to your diameter choice, ready to be edged to your frame by an optician. Any standard frame can be fitted, provided the lens diameter covers the shape.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-promise\" style=\"margin-top: 30px; padding: 18px 20px; background: #f8f8f6;\"\u003e\n\u003ch3 style=\"margin-top: 0;\"\u003eThe EastSupplier Promise\u003c\/h3\u003e\n\u003cp\u003eEastSupplier lists the corridor options, the index range, and the coating stack because those are the three choices that decide whether a progressive lens works for the wearer. Have your prescription ready before ordering, and request confirmation of the numbers if anything is unclear. Correctly produced prescription lenses are made to order.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-gallery\" style=\"margin-top: 30px; text-align: center;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H764217e62be7400683c7b7a4e5eaf08bv.jpg?v=1669332225\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H9be34ad35e374e73acb6ca21d48957d1S.jpg?v=1669332228\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H8c4e4218899642178fd188e16a073032M.jpg?v=1669332229\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1ml2DeqSWBuNjSsrbq6y0mVXaO.jpg?v=1669332230\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1kfeQbrPx2eJjSZFBq6zmZVXaL.jpg?v=1669332232\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1FqnEdL5G3KVjSZPxq6zI3XXaG.jpg?v=1669332233\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1B32CdMaH3KVjSZFjq6AFWpXau.jpg?v=1669332235\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB11lCrdoz.BuNjt_j7q6x0nFXaU.jpg?v=1669332237\" alt=\"The Corridor\" style=\"max-width: 100%; height: auto; margin-bottom: 12px; display: block;\"\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Product\", \"name\": \"The Corridor | Photochromic Anti-Blue Progressive Lenses, UV400 with HMC Coating\", \"description\": \"CR-39 progressive lenses with photochromic, anti-blue light, and UV400 protection, HMC coated, available in 1.56, 1.61, and 1.67 index with SPH +8.00 to -10.00.\", \"brand\": {\"@type\": \"Brand\", \"name\": \"BCLEAR\"}, \"sku\": \"2255800741311723-Photochromic Gray-1.56\", \"image\": [\"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H764217e62be7400683c7b7a4e5eaf08bv.jpg?v=1669332225\", \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H9be34ad35e374e73acb6ca21d48957d1S.jpg?v=1669332228\", \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H8c4e4218899642178fd188e16a073032M.jpg?v=1669332229\", \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1ml2DeqSWBuNjSsrbq6y0mVXaO.jpg?v=1669332230\", \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1kfeQbrPx2eJjSZFBq6zmZVXaL.jpg?v=1669332232\", \"https:\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/HTB1FqnEdL5G3KVjSZPxq6zI3XXaG.jpg?v=1669332233\"], \"offers\": {\"@type\": \"AggregateOffer\", \"priceCurrency\": \"USD\", \"lowPrice\": \"148.68\", \"highPrice\": \"223.02\", \"offerCount\": \"6\", \"availability\": \"https:\/\/schema.org\/InStock\", \"url\": \"https:\/\/eastsupplier.com\/products\/the-corridor-photochromic-progressive-lenses\"}, \"aggregateRating\": {\"@type\": \"AggregateRating\", \"ratingValue\": \"4.7\", \"reviewCount\": \"3\"}}\u003c\/script\u003e","brand":"East Supplier Platform","offers":[{"title":"Photochromic Gray \/ 1.56","offer_id":43810736931039,"sku":"2255800741311723-Photochromic Gray-1.56","price":148.68,"currency_code":"USD","in_stock":true},{"title":"Photochromic Brown \/ 1.56","offer_id":43810736963807,"sku":"2255800741311723-Photochromic Brown-1.56","price":159.3,"currency_code":"USD","in_stock":true},{"title":"Photochromic Gray \/ 1.61","offer_id":43810736996575,"sku":"2255800741311723-Photochromic Gray-1.61","price":169.92,"currency_code":"USD","in_stock":true},{"title":"Photochromic Brown \/ 1.61","offer_id":43810737062111,"sku":"2255800741311723-Photochromic Brown-1.61","price":180.54,"currency_code":"USD","in_stock":true},{"title":"Photochromic Gray \/ 1.67","offer_id":43810737094879,"sku":"2255800741311723-Photochromic Gray-1.67","price":212.4,"currency_code":"USD","in_stock":true},{"title":"Photochromic Brown \/ 1.67","offer_id":43810737127647,"sku":"2255800741311723-Photochromic Brown-1.67","price":223.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0503\/6412\/1244\/products\/H764217e62be7400683c7b7a4e5eaf08bv.jpg?v=1669332225","url":"https:\/\/eastsupplier.co.uk\/fr\/products\/the-corridor-photochromic-progressive-lenses","provider":"EastSupplier Platform","version":"1.0","type":"link"}