{"id":2726,"date":"2022-05-20T09:55:30","date_gmt":"2022-05-20T07:55:30","guid":{"rendered":"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/?page_id=2726"},"modified":"2023-08-30T11:26:07","modified_gmt":"2023-08-30T09:26:07","slug":"lens-thickness","status":"publish","type":"page","link":"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/eye-care\/lens-enhancements\/lens-thickness\/","title":{"rendered":"Lens Thickness"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2726\" class=\"elementor elementor-2726\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4824ec9 elementor-section-full_width elementor-section-height-min-height elementor-section-stretched elementor-section-height-default elementor-section-items-middle\" data-id=\"4824ec9\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&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-c404827\" data-id=\"c404827\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0ce3910 elementor-widget elementor-widget-heading\" data-id=\"0ce3910\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 20-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Lens Thickness<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-483a430 elementor-widget elementor-widget-text-editor\" data-id=\"483a430\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 20-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p style=\"margin: 0px;\">Eye Care &gt; Lens Enhancements &gt; <strong>Lens Thickness<\/strong><\/p>\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c11cad3 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c11cad3\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\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-d97fd3d\" data-id=\"d97fd3d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-712bc2d elementor-widget elementor-widget-spacer\" data-id=\"712bc2d\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 20-08-2023 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3561a1fc elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3561a1fc\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\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-5a821dbf\" data-id=\"5a821dbf\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-274a3bc5 elementor-widget elementor-widget-text-editor\" data-id=\"274a3bc5\" 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<!-- wp:paragraph -->\n<p>This is a demonstration that shows how the thickness of a spectacle lens is affected by using lens materials that have a different refractive index. Hi-Index lenses are useful in reducing the thickness of lenses with a high prescription, thus allowing the wearer to enjoy slimmmer and more fashionable looking eyewear.<\/p>\n<p>Using the Power drop-down, select the closest lens prescription. The other lens values can be left at their &#8216;default&#8217; settings. Then select different index values at the bottom of each image and compare the results!<\/p>\n<!-- \/wp:paragraph -->\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fdb47f6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fdb47f6\" 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-66 elementor-top-column elementor-element elementor-element-237a473\" data-id=\"237a473\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e6c4872 elementor-widget elementor-widget-html\" data-id=\"e6c4872\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<form name=\"Frame1Variables\">\r\n    <div align=\"center\">\r\n    \t<img loading=\"lazy\" decoding=\"async\" id=\"frame1\" class=\"img-responsive\" src=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/thickness-3-0.jpg\" alt=\"\" width=\"447\" height=\"165\" name=\"frame1\" \/>\r\n    \t<table style=\"max-width: 447px; width: 100%; border-color: #000000; border-style: solid; background: url('initial') #000000;\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\">\r\n    \t\t<tbody>\r\n    \t\t\t<tr>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 40px;\" align=\"right\">Index<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #000000; width: 80px;\" align=\"right\"><select style=\"width:70px; padding:0.25em;\" onchange=\"CalcThickness(this.value, 'frame1');\" name=\"frame1index\" onchange=\"CalcThickness(this.value, 'frame1');\"><option selected=\"selected\" value=\"1.5\">1.5<\/option><option value=\"1.55\">1.55<\/option><option value=\"1.6\">1.6<\/option><option value=\"1.65\">1.65<\/option><option value=\"1.7\">1.7<\/option><option value=\"1.75\">1.75<\/option><option value=\"1.8\">1.8<\/option><\/select><\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff;\">&nbsp;<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 140px;\" align=\"right\">Lens Thickness:<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 50px;\" align=\"left\">\r\n    \t\t\t\t\t<div id=\"frame1mm\">42mm<\/div>\r\n    \t\t\t\t<\/td>\r\n    \t\t\t<\/tr>\r\n    \t\t<\/tbody>\r\n    \t<\/table>\r\n    <\/div>\r\n<\/form>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bd2e84 elementor-widget elementor-widget-html\" data-id=\"2bd2e84\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<form name=\"Frame2Variables\">\r\n    <div align=\"center\">\r\n    \t<img loading=\"lazy\" decoding=\"async\" id=\"frame2\" class=\"img-responsive\" src=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/thickness-3-0.jpg\" alt=\"\" width=\"447\" height=\"165\" name=\"frame2\" \/>\r\n    \t<table style=\"max-width: 447px; width: 100%; border-color: #000000; border-style: solid; background: url('initial') #000000;\" cellspacing=\"0\" cellpadding=\"0\">\r\n    \t\t<tbody>\r\n    \t\t\t<tr>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 40px;\" align=\"right\">Index<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #000000; width: 80px;\" align=\"right\"><select style=\"width:70px; padding:0.25em;\" onchange=\"CalcThickness(this.value, 'frame2');\" name=\"frame2index\" onchange=\"CalcThickness(this.value, 'frame2');\"><option selected=\"selected\" value=\"1.5\">1.5<\/option><option value=\"1.55\">1.55<\/option><option value=\"1.6\">1.6<\/option><option value=\"1.65\">1.65<\/option><option value=\"1.7\">1.7<\/option><option value=\"1.75\">1.75<\/option><option value=\"1.8\">1.8<\/option><\/select><\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff;\">&nbsp;<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 140px;\" align=\"right\">Lens Thickness:<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 50px;\" align=\"left\">\r\n    \t\t\t\t\t<div id=\"frame2mm\">42mm<\/div>\r\n    \t\t\t\t<\/td>\r\n    \t\t\t<\/tr>\r\n    \t\t<\/tbody>\r\n    \t<\/table>\r\n    <\/div>\r\n<\/form>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b0099ba elementor-widget elementor-widget-html\" data-id=\"b0099ba\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<form name=\"Frame3Variables\">\r\n    <div align=\"center\">\r\n    \t<img loading=\"lazy\" decoding=\"async\" id=\"frame3\" class=\"img-responsive\" src=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/thickness-3-0.jpg\" alt=\"\" width=\"447\" height=\"165\" name=\"frame3\" \/>\r\n    \t<table style=\"max-width: 447px; width: 100%; border-color: #000000; border-style: solid; background: url('initial') #000000;\" cellspacing=\"0\" cellpadding=\"0\">\r\n    \t\t<tbody>\r\n    \t\t\t<tr>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 40px;\" align=\"right\">Index<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #000000; width: 80px;\" align=\"right\"><select style=\"width:70px; padding:0.25em;\" onchange=\"CalcThickness(this.value, 'frame3');\" name=\"frame3index\" onchange=\"CalcThickness(this.value, 'frame3');\"><option selected=\"selected\" value=\"1.5\">1.5<\/option><option value=\"1.55\">1.55<\/option><option value=\"1.6\">1.6<\/option><option value=\"1.65\">1.65<\/option><option value=\"1.7\">1.7<\/option><option value=\"1.75\">1.75<\/option><option value=\"1.8\">1.8<\/option><\/select><\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff;\">&nbsp;<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 140px;\" align=\"right\">Lens Thickness:<\/td>\r\n    \t\t\t\t<td style=\"padding: 3px; color: #ffffff; width: 50px;\" align=\"left\">\r\n    \t\t\t\t\t<div id=\"frame3mm\">42mm<\/div>\r\n    \t\t\t\t<\/td>\r\n    \t\t\t<\/tr>\r\n    \t\t<\/tbody>\r\n    \t<\/table>\r\n    <\/div>\r\n<\/form>\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-33 elementor-top-column elementor-element elementor-element-88faa2a\" data-id=\"88faa2a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6d617e2 elementor-widget elementor-widget-heading\" data-id=\"6d617e2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Lens Values<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4573198 elementor-widget elementor-widget-html\" data-id=\"4573198\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<form name=\"LensVariables\">\r\n    <table style=\"width: 280px;\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" align=\"center\">\r\n    \t<tbody>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">Power:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"power\" onchange=\"updateAllFrames();\"><option selected=\"selected\" value=\"0\">0<\/option><option value=\"-0.25\">-0.25<\/option><option value=\"-0.5\">-0.5<\/option><option value=\"-0.75\">-0.75<\/option><option value=\"-1\">-1<\/option><option value=\"-1.25\">-1.25<\/option><option value=\"-1.5\">-1.5<\/option><option value=\"-1.75\">-1.75<\/option><option value=\"-2\">-2<\/option><option value=\"-2.25\">-2.25<\/option><option value=\"-2.5\">-2.5<\/option><option value=\"-2.75\">-2.75<\/option><option value=\"-3\">-3<\/option><option value=\"-3.25\">-3.25<\/option><option value=\"-3.5\">-3.5<\/option><option value=\"-3.75\">-3.75<\/option><option value=\"-4\">-4<\/option><option value=\"-4.25\">-4.25<\/option><option value=\"-4.5\">-4.5<\/option><option value=\"-4.75\">-4.75<\/option><option value=\"-5\">-5<\/option><option value=\"-5.25\">-5.25<\/option><option value=\"-5.5\">-5.5<\/option><option value=\"-5.75\">-5.75<\/option><option value=\"-6\">-6<\/option><option value=\"-6.25\">-6.25<\/option><option value=\"-6.5\">-6.5<\/option><option value=\"-6.75\">-6.75<\/option><option value=\"-7\">-7<\/option><option value=\"-7.25\">-7.25<\/option><option value=\"-7.5\">-7.5<\/option><option value=\"-7.75\">-7.75<\/option><option value=\"-8\">-8<\/option><option value=\"-8.25\">-8.25<\/option><option value=\"-8.5\">-8.5<\/option><option value=\"-8.75\">-8.75<\/option><option value=\"-9\">-9<\/option><option value=\"-9.25\">-9.25<\/option><option value=\"-9.5\">-9.5<\/option><option value=\"-9.75\">-9.75<\/option><option value=\"-10\">-10<\/option><option value=\"-10.25\">-10.25<\/option><option value=\"-10.5\">-10.5<\/option><option value=\"-10.75\">-10.75<\/option><option value=\"-11\">-11<\/option><option value=\"-11.25\">-11.25<\/option><option value=\"-11.5\">-11.5<\/option><option value=\"-11.75\">-11.75<\/option><option value=\"-12\">-12<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">Eyesize:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"eyesize\" onchange=\"updateAllFrames();\"><option value=\"40\">40<\/option><option value=\"41\">41<\/option><option value=\"42\">42<\/option><option value=\"43\">43<\/option><option value=\"44\">44<\/option><option value=\"45\">45<\/option><option value=\"46\">46<\/option><option value=\"47\">47<\/option><option value=\"48\">48<\/option><option value=\"49\">49<\/option><option selected=\"selected\" value=\"50\">50<\/option><option value=\"51\">51<\/option><option value=\"52\">52<\/option><option value=\"53\">53<\/option><option value=\"54\">54<\/option><option value=\"55\">55<\/option><option value=\"56\">56<\/option><option value=\"57\">57<\/option><option value=\"58\">58<\/option><option value=\"59\">59<\/option><option value=\"60\">60<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">Bridge:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"bridge\" onchange=\"updateAllFrames();\"><option value=\"16\">16<\/option><option value=\"17\">17<\/option><option value=\"18\">18<\/option><option value=\"19\">19<\/option><option selected=\"selected\" value=\"20\">20<\/option><option value=\"21\">21<\/option><option value=\"22\">22<\/option><option value=\"23\">23<\/option><option value=\"24\">24<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">Effective Diameter:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"diameter\" onchange=\"updateAllFrames();\"><option value=\"40\">40<\/option><option value=\"41\">41<\/option><option value=\"42\">42<\/option><option value=\"43\">43<\/option><option value=\"44\">44<\/option><option value=\"45\">45<\/option><option value=\"46\">46<\/option><option value=\"47\">47<\/option><option value=\"48\">48<\/option><option value=\"49\">49<\/option><option selected=\"selected\" value=\"50\">50<\/option><option value=\"51\">51<\/option><option value=\"52\">52<\/option><option value=\"53\">53<\/option><option value=\"54\">54<\/option><option value=\"55\">55<\/option><option value=\"56\">56<\/option><option value=\"57\">57<\/option><option value=\"58\">58<\/option><option value=\"59\">59<\/option><option value=\"60\">60<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">Centre Thickness:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"thickness\" onchange=\"updateAllFrames();\"><option value=\"1.3\">1.3<\/option><option value=\"1.4\">1.4<\/option><option value=\"1.5\">1.5<\/option><option value=\"1.6\">1.6<\/option><option value=\"1.7\">1.7<\/option><option selected=\"selected\" value=\"1.8\">1.8<\/option><option value=\"1.9\">1.9<\/option><option value=\"2.0\">2.0<\/option><option value=\"2.1\">2.1<\/option><option value=\"2.2\">2.2<\/option><option value=\"2.3\">2.3<\/option><option value=\"2.4\">2.4<\/option><option value=\"2.5\">2.5<\/option><option value=\"2.6\">2.6<\/option><option value=\"2.7\">2.7<\/option><option value=\"2.8\">2.8<\/option><option value=\"2.9\">2.9<\/option><option value=\"3.0\">3.0<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t\t<tr>\r\n    \t\t\t<td align=\"left\" valign=\"middle\">PD:<\/td>\r\n    \t\t\t<td width=\"90\" align=\"right\" valign=\"middle\"><select style=\"width:80px;\" onchange=\"updateAllFrames();\" name=\"pd\" onchange=\"updateAllFrames();\"><option value=\"52\">52<\/option><option value=\"53\">53<\/option><option value=\"54\">54<\/option><option value=\"55\">55<\/option><option value=\"56\">56<\/option><option value=\"57\">57<\/option><option value=\"58\">58<\/option><option value=\"59\">59<\/option><option value=\"60\">60<\/option><option value=\"61\">61<\/option><option value=\"62\">62<\/option><option value=\"63\">63<\/option><option value=\"64\">64<\/option><option selected=\"selected\" value=\"65\">65<\/option><option value=\"66\">66<\/option><option value=\"67\">67<\/option><option value=\"68\">68<\/option><option value=\"69\">69<\/option><option value=\"70\">70<\/option><option value=\"71\">71<\/option><option value=\"72\">72<\/option><option value=\"73\">73<\/option><option value=\"74\">74<\/option><option value=\"75\">75<\/option><option value=\"76\">76<\/option><option value=\"77\">77<\/option><option value=\"78\">78<\/option><option value=\"79\">79<\/option><option value=\"80\">80<\/option><\/select><\/td>\r\n    \t\t<\/tr>\r\n    \t<\/tbody>\r\n    <\/table>\r\n<\/form>\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-139c19f elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"139c19f\" data-element_type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\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-94188c2\" data-id=\"94188c2\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c02a04d elementor-widget elementor-widget-html\" data-id=\"c02a04d\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<script language=\"javascript\" type=\"text\/javascript\">\r\n\r\n\tfunction CalcThickness(intRefIndex,imgFrame){\r\n\r\n\t\tintRefIndex = parseFloat(intRefIndex);\r\n\r\n\t\t\/\/acquire variable values\r\n\t\tintPower = parseFloat(document.forms[\"LensVariables\"][\"power\"].value);\r\n\t\tintEyesize = parseFloat(document.forms[\"LensVariables\"][\"eyesize\"].value);\r\n\t\tintBridge = parseFloat(document.forms[\"LensVariables\"][\"bridge\"].value);\r\n\t\tintDiameter = parseFloat(document.forms[\"LensVariables\"][\"diameter\"].value);\r\n\t\tintCentre = parseFloat(document.forms[\"LensVariables\"][\"thickness\"].value);\r\n\t\tintPD = parseFloat(document.forms[\"LensVariables\"][\"pd\"].value);\r\n\t\tvar intThickness = 0;\r\n\r\n\t\tif (intDiameter < intEyesize){\r\n\t\t\tintDiameter = intEyesize;\r\n\t\t}\r\n\r\n\t\t\/\/calculation of lens thickness\r\n\t\tj = intDiameter + intEyesize + intBridge - intPD;\r\n\t\ts = (j \/ 2 * j \/ 2) * Math.abs(intPower) \/ (2000 * (intRefIndex - 1));\r\n\t\tintThickness = s + intCentre;\r\n\r\n\t\t\/\/shift the movieclips of the lenses to the corresponding frame\r\n\t\tsag = intThickness;\r\n\t\tif (sag <= 2.25) {\r\n\t\t\tswapFrameImage(\"thickness-3-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 2.25 && sag <= 3.25) {\r\n\t\t\tswapFrameImage(\"thickness-3-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 3.25 && sag <= 3.75) {\r\n\t\t\tswapFrameImage(\"thickness-3-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 3.75 && sag <= 4.25) {\r\n\t\t\tswapFrameImage(\"thickness-4-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 4.25 && sag <= 4.75) {\r\n\t\t\tswapFrameImage(\"thickness-4-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 4.75 && sag <= 5.25) {\r\n\t\t\tswapFrameImage(\"thickness-5-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 5.25 && sag <= 5.75) {\r\n\t\t\tswapFrameImage(\"thickness-5-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 5.75 && sag <= 6.25) {\r\n\t\t\tswapFrameImage(\"thickness-6-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 6.25 && sag <= 6.75) {\r\n\t\t\tswapFrameImage(\"thickness-6-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 6.75 && sag <= 7.25) {\r\n\t\t\tswapFrameImage(\"thickness-7-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 7.25 && sag <= 7.75) {\r\n\t\t\tswapFrameImage(\"thickness-7-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 7.75 && sag <= 8.25) {\r\n\t\t\tswapFrameImage(\"thickness-8-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 8.25 && sag <= 8.75) {\r\n\t\t\tswapFrameImage(\"thickness-8-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 8.75 && sag <= 9.25) {\r\n\t\t\tswapFrameImage(\"thickness-9-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 9.25 && sag <= 9.75) {\r\n\t\t\tswapFrameImage(\"thickness-9-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 9.75 && sag <= 10.25) {\r\n\t\t\tswapFrameImage(\"thickness-10-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 10.25 && sag <= 10.75) {\r\n\t\t\tswapFrameImage(\"thickness-10-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 10.75 && sag <= 11.25) {\r\n\t\t\tswapFrameImage(\"thickness-11-0.jpg\",imgFrame);\r\n\t\t} else if (sag > 11.25 && sag <= 11.75) {\r\n\t\t\tswapFrameImage(\"thickness-11-5.jpg\",imgFrame);\r\n\t\t} else if (sag > 11.75) {\r\n\t\t\tswapFrameImage(\"thickness-12-0.jpg\",imgFrame);\r\n\t\t}\r\n\r\n\t\t\/\/display resulting lens thickness\r\n\t\tdocument.getElementById(imgFrame + \"mm\").innerHTML = Math.round(intThickness * 100) \/ 100 + \"mm\";\r\n\r\n\t}\r\n\r\n\tfunction updateAllFrames(){\r\n\t\tCalcThickness(document.forms[\"Frame1Variables\"][\"frame1index\"].value, 'frame1');\r\n\t\tCalcThickness(document.forms[\"Frame2Variables\"][\"frame2index\"].value, 'frame2');\r\n\t\tCalcThickness(document.forms[\"Frame3Variables\"][\"frame3index\"].value, 'frame3');\r\n\t}\r\n\r\n\tfunction swapFrameImage(imgThickness, imgFrame){\r\n\t\tdocument.getElementById(imgFrame).src = \"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/\" + imgThickness;\r\n\t}\r\n\r\n<\/script>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d41d36a elementor-widget elementor-widget-spacer\" data-id=\"d41d36a\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Lens Thickness Eye Care &gt; Lens Enhancements &gt; Lens Thickness This is a demonstration that shows how the thickness of a spectacle lens is affected by using lens materials that have a different refractive index. Hi-Index lenses are useful in reducing the thickness of lenses with a high prescription, thus allowing the wearer to enjoy &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/eye-care\/lens-enhancements\/lens-thickness\/\"> <span class=\"screen-reader-text\">Lens Thickness<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2111,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"folder":[19],"class_list":["post-2726","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Lens Thickness - I.C.U. Optometrists<\/title>\n<meta name=\"description\" content=\"A demonstration that shows how the thickness of a spectacle lens is affected by using lens materials that have a different refractive index.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/eye-care\/lens-enhancements\/lens-thickness\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lens Thickness - I.C.U. 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