{"id":2157,"date":"2026-08-01T17:58:35","date_gmt":"2026-08-01T17:58:35","guid":{"rendered":"https:\/\/matterseyewear.com\/?p=2157"},"modified":"2026-08-01T18:02:58","modified_gmt":"2026-08-01T18:02:58","slug":"que-significa-uv400-gafas-sol","status":"publish","type":"post","link":"https:\/\/matterseyewear.com\/en\/que-significa-uv400-gafas-sol\/","title":{"rendered":"What does UV400 mean on sunglasses?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">En la etiqueta de unas gafas de sol pueden aparecer varias palabras: polarizadas, categor\u00eda 3, UV400, lentes degradadas o protecci\u00f3n ultravioleta.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Aunque suelen presentarse juntas, no describen la misma propiedad. Entender qu\u00e9 significa UV400 ayuda a distinguir la protecci\u00f3n frente a la radiaci\u00f3n del simple color oscuro de la lente.<\/span><\/p>\n<h2><b>El n\u00famero 400 se refiere a nan\u00f3metros<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La radiaci\u00f3n ultravioleta se encuentra fuera de la zona visible para el ojo humano. El t\u00e9rmino UV400 indica que la lente est\u00e1 dise\u00f1ada para filtrar radiaci\u00f3n ultravioleta hasta una longitud de onda de 400 nan\u00f3metros.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ese l\u00edmite abarca las regiones UVA y UVB relevantes para la protecci\u00f3n ocular. Por eso tambi\u00e9n puede aparecer una indicaci\u00f3n como \u201c100 % UVA y UVB\u201d.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La Academia Americana de Oftalmolog\u00eda recomienda elegir gafas que bloqueen el 99 o el 100 % de la radiaci\u00f3n UVA y UVB.<\/span><\/p>\n<h2><b>Una lente muy oscura no protege necesariamente m\u00e1s<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La oscuridad indica cu\u00e1nta luz visible deja pasar la lente. No informa, por s\u00ed sola, de la cantidad de radiaci\u00f3n ultravioleta que filtra.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Una lente clara puede incorporar una buena protecci\u00f3n UV. Una lente muy oscura, si no cumple las especificaciones necesarias, puede filtrar mucha luz visible y dejar pasar radiaci\u00f3n ultravioleta.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Por eso no conviene juzgar unas gafas \u00fanicamente por el color. RNIB recuerda que la oscuridad de la lente no determina la protecci\u00f3n UV.<\/span><\/p>\n<h2><b>UV400 tampoco significa polarizaci\u00f3n<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">La polarizaci\u00f3n reduce determinados reflejos procedentes del agua, el pavimento o superficies brillantes. La protecci\u00f3n UV act\u00faa sobre una parte no visible de la radiaci\u00f3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Son caracter\u00edsticas complementarias, pero independientes. Una lente puede incorporar una, las dos o ninguna.<\/span><\/p>\n<h2><b>\u00bfQu\u00e9 relaci\u00f3n tiene con la categor\u00eda?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Las categor\u00edas del 0 al 4 clasifican la cantidad de luz visible que atraviesa una lente.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Una categor\u00eda alta implica una lente m\u00e1s oscura, pero no necesariamente una protecci\u00f3n UV superior. Todas las gafas de sol conformes deber\u00edan proporcionar el nivel de protecci\u00f3n ultravioleta indicado, independientemente de que sean categor\u00eda 1, 2 o 3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Por tanto, una descripci\u00f3n completa podr\u00eda indicar:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>UV400:<\/b><span style=\"font-weight: 400;\"> protecci\u00f3n ultravioleta.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Categor\u00eda 3:<\/b><span style=\"font-weight: 400;\"> reducci\u00f3n alta de la luz visible.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Polarizada:<\/b><span style=\"font-weight: 400;\"> reducci\u00f3n de reflejos.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Las gafas de sol de Matters re\u00fanen estas tres caracter\u00edsticas.<\/span><\/p>\n<h2><b>C\u00f3mo comprobar la protecci\u00f3n al comprar<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Busca informaci\u00f3n clara en el producto, el etiquetado o la documentaci\u00f3n:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Indicaci\u00f3n UV400 o 100 % UVA\/UVB.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Filter category.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Identificaci\u00f3n del fabricante o importador.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Marcado CE cuando corresponda.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Advertencias de uso, especialmente para conducir.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Informaci\u00f3n sobre la norma aplicable.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>En la Uni\u00f3n Europea, el marcado CE indica que el fabricante declara que el producto cumple los requisitos legales correspondientes. No es un simple elemento decorativo del envase.<\/p>\n<p><span style=\"font-weight: 400;\">Las pruebas caseras con pantallas o linternas no permiten verificar de manera fiable el filtrado ultravioleta. Para comprobar unas gafas antiguas o sin informaci\u00f3n clara, se necesita instrumental espec\u00edfico.<\/span><\/p>\n<h2><b>La forma y el ajuste tambi\u00e9n influyen<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Una lente puede proteger correctamente de frente y dejar entrar luz por los laterales. Las monturas grandes, ajustadas o envolventes reducen la exposici\u00f3n lateral.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Tambi\u00e9n conviene combinar las gafas con otros elementos, como sombreros o viseras, especialmente durante exposiciones prolongadas.<\/span><\/p>\n<h2><b>\u00bfSolo son necesarias en verano?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">No. La radiaci\u00f3n ultravioleta est\u00e1 presente durante todo el a\u00f1o y puede reflejarse en agua, arena o nieve. Los d\u00edas nublados tampoco eliminan completamente la exposici\u00f3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">La elecci\u00f3n debe depender del entorno, la luminosidad y el tiempo que pasar\u00e1s al aire libre, no \u00fanicamente de la estaci\u00f3n.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">UV400 no describe el estilo ni el color de unas gafas. Describe una funci\u00f3n de protecci\u00f3n que conviene comprobar antes de fijarse en cualquier otro detalle.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>En la etiqueta de unas gafas de sol pueden aparecer varias palabras: polarizadas, categor\u00eda 3, UV400, lentes degradadas o protecci\u00f3n ultravioleta. Aunque suelen presentarse juntas, no describen la misma propiedad. Entender qu\u00e9 significa UV400 ayuda a distinguir la protecci\u00f3n frente a la radiaci\u00f3n del simple color oscuro de la lente. El n\u00famero 400 se refiere [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2159,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2157","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u00bfQu\u00e9 significa UV400 en unas gafas de sol?<\/title>\n<meta name=\"description\" content=\"UV400, polarizaci\u00f3n y oscuridad no son lo mismo. 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