{"id":5846,"date":"2021-02-14T18:17:39","date_gmt":"2021-02-14T17:17:39","guid":{"rendered":"https:\/\/wetzlich.detayls-dev.de\/?page_id=5846"},"modified":"2023-10-12T11:21:01","modified_gmt":"2023-10-12T09:21:01","slug":"lens-thickness-material","status":"publish","type":"page","link":"https:\/\/staging.wetzlich.de\/en\/additional-features\/lens-thickness-material\/","title":{"rendered":"Lens thickness | Material"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"5846\" class=\"elementor elementor-5846 elementor-1153\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-438b550 elementor-section-height-min-height elementor-section-content-top elementor-section-items-top elementor-section-boxed elementor-section-height-default\" data-id=\"438b550\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-191d347\" data-id=\"191d347\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-80a13f3 elementor-widget elementor-widget-heading\" data-id=\"80a13f3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">REFRACTIVE INDEX and materials<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d92144 elementor-widget elementor-widget-text-editor\" data-id=\"7d92144\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The higher the refractive index, the thinner, lighter and more attractive the lens is with the same diopter value.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7165e93 elementor-hidden-mobile\" data-id=\"7165e93\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a0450dd elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a0450dd\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4104a37\" data-id=\"4104a37\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b249e7c elementor-widget elementor-widget-heading\" data-id=\"b249e7c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The index of refraction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-51b9040 elementor-widget elementor-widget-text-editor\" data-id=\"51b9040\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The higher the refractive index, the thinner, lighter and more attractive the lens at the same dioptre value. This not only increases comfort, but also makes them look good. The advantage of thin lenses is that you are relatively free in your choice of frame.\u00a0<\/p><p>The lenses are also more comfortable to wear due to the reduced weight. Spectacle wearers with high values should therefore always opt for a higher index. Click on \u201cspectacle advice\u201d to find out more about the various characteristics of the indices.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-78d932f elementor-section-content-top elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"78d932f\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3143364\" data-id=\"3143364\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-38b936a elementor-widget elementor-widget-heading\" data-id=\"38b936a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Glass thickness advice tool\u200b<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-304c486 elementor-widget elementor-widget-html\" data-id=\"304c486\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"BorlabsCookie _brlbs-cb-default\"><div class=\"_brlbs-content-blocker\"> <div class=\"_brlbs-default\"> <p>Click on the button below to load the contents of www.wetzlich.de.<\/p> <p><a class=\"_brlbs-btn\" href=\"#\" data-borlabs-cookie-unblock role=\"button\">Load content<\/a><\/p> <\/div> <\/div><div class=\"borlabs-hide\" data-borlabs-cookie-type=\"content-blocker\" data-borlabs-cookie-id=\"default\"><script type=\"text\/template\">PGlmcmFtZSBzcmM9Imh0dHBzOi8vd3d3LndldHpsaWNoLmRlL2dsYXNiZXJhdHVuZy9nbGFzZGlja2UuaHRtbCIgaGVpZ2h0PSI3MDAiPjwvaWZyYW1lPg==<\/script><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-04182cf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"04182cf\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5b2fed1\" data-id=\"5b2fed1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d2f60eb elementor-widget elementor-widget-heading\" data-id=\"d2f60eb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Which materials can be used for lenses?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc7cde1 elementor-widget elementor-widget-text-editor\" data-id=\"dc7cde1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Although we usually refer to the spectacles we wear as \u201cglasses\u201d, we don\u2019t realise that most lenses are now made of plastic. In principle, opticians have the option of choosing between mineral glass or plastic. These two materials have different properties that play an important role in the purchase decision.<\/p><p>Mineral glass is the traditional material for spectacle lenses. Like conventional glass, it consists of a special mixture of quartz, soda and lime. It breaks more easily and is heavier than plastic. The advantages: it is robust and scratches less easily. Protection against scratches is now achieved by special coatings, even on plastic lenses. That\u2019s why about 95% of all spectacle wearers choose plastic lenses.<\/p><p>(Source: <a href=\"https:\/\/www.sehen.de\/\" target=\"_blank\" rel=\"noopener\">Kuratorium Gutes Sehen<\/a>)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6153e01 elementor-section-content-top elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6153e01\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-530d5f8\" data-id=\"530d5f8\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a2d2063 elementor-widget elementor-widget-accordion\" data-id=\"a2d2063\" data-element_type=\"widget\" data-widget_type=\"accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion\">\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1701\" class=\"elementor-tab-title\" data-tab=\"1\" role=\"button\" aria-controls=\"elementor-tab-content-1701\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Mineral glass<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1701\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"1\" role=\"region\" aria-labelledby=\"elementor-tab-title-1701\"><p>Glass (silicate) is the classic material for spectacle lenses. Glass lenses are approx. 40% heavier than plastic lenses, very fragile but naturally scratch-resistant and acid-proof. Especially if the lens wearer comes into contact with a lot of vapours, acids and dust, lenses made of glass can still be a sensible choice. For the average wearer of glasses, however, the disadvantages far outweigh the benefits. Glass is completely unsuitable for children\u2019s glasses or sports glasses, as the risk of them breaking is too great.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1702\" class=\"elementor-tab-title\" data-tab=\"2\" role=\"button\" aria-controls=\"elementor-tab-content-1702\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Plastic lenses<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1702\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"2\" role=\"region\" aria-labelledby=\"elementor-tab-title-1702\"><p>Spectacle lenses made of plastic are on average about 40% lighter than lenses made of mineral glass and are unbreakable. In contrast to mineral lenses, plastic lenses do not have any natural scratch resistance. However, this is a problem that can be solved \u2013 even car headlights are now mostly made of plastic and when was the last time you saw a scratched headlight? The solution is hard lacquers in which plastic lenses are soaked several times until they have almost the same scratch-resistant properties as lenses made of mineral glass.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1703\" class=\"elementor-tab-title\" data-tab=\"3\" role=\"button\" aria-controls=\"elementor-tab-content-1703\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">Polycarbonate<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1703\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"3\" role=\"region\" aria-labelledby=\"elementor-tab-title-1703\"><p>Polycarbonate is also a type of plastic and the strongest material. Polycarbonate lenses can withstand even very heavy impacts and offer optimum protection in sports and industrial safety. So the question is: why is polycarbonate not used for all lenses? The answer is simple: because there is also a downside. The optical performance of the material is significantly inferior to that of other lens materials and the lenses are quite thick due to the relatively low refractive index (which determines the lens thickness).<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1704\" class=\"elementor-tab-title\" data-tab=\"4\" role=\"button\" aria-controls=\"elementor-tab-content-1704\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">High-index<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1704\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"4\" role=\"region\" aria-labelledby=\"elementor-tab-title-1704\"><p>There are an enormous number of names for this category of lens in the optical retail trade. These range from extra-thin, through high-index, to thin-ground. The fact is that, with these lenses, the higher quality material is all that matters. The material has a higher refractive index and it is therefore possible to produce thinner and lighter lenses with the same effect. The best known so-called high refractive indices are 1.60, 1.67 and 1.74.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-accordion-item\">\n\t\t\t\t\t<div id=\"elementor-tab-title-1705\" class=\"elementor-tab-title\" data-tab=\"5\" role=\"button\" aria-controls=\"elementor-tab-content-1705\" aria-expanded=\"false\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon elementor-accordion-icon-left\" aria-hidden=\"true\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-closed\"><i class=\"fas fa-plus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t<span class=\"elementor-accordion-icon-opened\"><i class=\"fas fa-minus\"><\/i><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-accordion-title\" tabindex=\"0\">UV 420 materials<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div id=\"elementor-tab-content-1705\" class=\"elementor-tab-content elementor-clearfix\" data-tab=\"5\" role=\"region\" aria-labelledby=\"elementor-tab-title-1705\"><p>The Protect UV420 materials already have 100% UV protection and a blue light filter up to 420nm without the need for a coating. The UV 420 materials block light up to 410nm completely and reduce the spectrum from 410 to 420nm by 86%.<\/p><p>Advantages:<\/p><ul><li>100% UV protection<\/li><li>Contrast enhancement<\/li><li>Fatigue-free vision<\/li><li>Glare protection<\/li><li>Prevention of age-related macular degeneration<\/li><\/ul><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5db6043 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5db6043\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-13c086bb\" data-id=\"13c086bb\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3adc347b elementor-widget elementor-widget-heading\" data-id=\"3adc347b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Any questions?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-56be94cc elementor-widget elementor-widget-heading\" data-id=\"56be94cc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Call us now on <br>\ntel.: +49 2162 370<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>REFRACTIVE INDEX and materials The higher the refractive index, the thinner, lighter and more attractive the lens is with the same diopter value. The index of refraction The higher the refractive index, the thinner, lighter and more attractive the lens at the same dioptre value. This not only increases comfort, but also makes them look [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":5830,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/pages\/5846"}],"collection":[{"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/comments?post=5846"}],"version-history":[{"count":0,"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/pages\/5846\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/pages\/5830"}],"wp:attachment":[{"href":"https:\/\/staging.wetzlich.de\/en\/wp-json\/wp\/v2\/media?parent=5846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}