{"id":1745,"date":"2022-05-16T08:19:37","date_gmt":"2022-05-16T06:19:37","guid":{"rendered":"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/?page_id=1745"},"modified":"2022-07-05T13:32:26","modified_gmt":"2022-07-05T11:32:26","slug":"colour-blindness","status":"publish","type":"page","link":"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/services\/colour-blindness\/","title":{"rendered":"Colour Blindness"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1745\" class=\"elementor elementor-1745\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-31c0400 elementor-section-full_width elementor-section-height-min-height elementor-section-stretched elementor-section-height-default elementor-section-items-middle\" data-id=\"31c0400\" 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-8d5a864\" data-id=\"8d5a864\" 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-6b8217a elementor-widget elementor-widget-heading\" data-id=\"6b8217a\" 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\">Colour Blindness<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f7b411 elementor-widget elementor-widget-text-editor\" data-id=\"6f7b411\" 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;\">Services &gt; <strong>Colour Blindness<\/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-05c278f elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"05c278f\" 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-e4ac774\" data-id=\"e4ac774\" 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-020233c elementor-widget elementor-widget-spacer\" data-id=\"020233c\" 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-86633ec elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"86633ec\" 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-66 elementor-top-column elementor-element elementor-element-d84468b\" data-id=\"d84468b\" 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-d2ba029 elementor-widget elementor-widget-text-editor\" data-id=\"d2ba029\" 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<p>Colour blindness may be a hereditary condition or caused by disease of the optic nerve or retina.\u00a0 Acquired colour vision problems only affect the eye with the disease and may become progressively worse over time.\u00a0 Patients with a colour vision defect caused by disease usually have trouble discriminating blues and yellows.\u00a0<\/p><p>Inherited colour blindness is most common, affects both eyes, and does not worsen over time.\u00a0 This type is found in about 8% of males and 0.4% of females.\u00a0 These colour problems are linked to the X chromosome and are almost always passed from a mother to her son.<\/p><p>Colour blindness may be partial (affecting only some colours), or complete (affecting all colours).\u00a0 Complete colour blindness is very rare.\u00a0 Those who are completely colour blind often have other serious eye problems as well.<\/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<div class=\"elementor-column elementor-col-33 elementor-top-column elementor-element elementor-element-3387da3\" data-id=\"3387da3\" 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-acf9478 elementor-widget elementor-widget-image\" data-id=\"acf9478\" data-element_type=\"widget\" data-widget_type=\"image.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-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"240\" src=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/service-colour-blindness.jpg\" class=\"attachment-medium_large size-medium_large wp-image-1799\" alt=\"Colour Blindness\" srcset=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/service-colour-blindness.jpg 400w, https:\/\/www.eyemark.co.za\/demos\/comprehensive\/wp-content\/uploads\/2022\/05\/service-colour-blindness-300x180.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\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\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7f4b6a9 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7f4b6a9\" 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-bc4754f\" data-id=\"bc4754f\" 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-17f1ed8 elementor-widget elementor-widget-text-editor\" data-id=\"17f1ed8\" 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<p>Photoreceptors called cones allow us to appreciate colour.\u00a0 These are concentrated in the very centre of the retina and contain three photosensitive pigments:\u00a0 red, green and blue.\u00a0 Those with defective colour vision have a deficiency or absence in one or more of these pigments.\u00a0 Those with normal colour vision are referred to as trichromats.\u00a0 People with a deficiency in one of the pigments are called anomalous trichromats (the most common type of colour vision problem.)\u00a0 A dichromat has a complete absence in one cone pigment.<\/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-1cd1aa7e elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1cd1aa7e\" 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-7129bf10\" data-id=\"7129bf10\" 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-1ee6e381 elementor-widget elementor-widget-text-editor\" data-id=\"1ee6e381\" 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<p><strong>Signs and Symptoms<\/strong><\/p>\n<ul>\n<li>The symptoms of colour blindness are dependent on several factors, such as whether the problem is congenital, acquired, partial, or complete.<\/li>\n<li>Difficulty distinguishing reds and greens (most common)<\/li>\n<li>Difficulty distinguishing blues and greens (less common)<\/li>\n<\/ul>\n<p>The symptoms of more serious inherited colour vision problems and some acquired types&#8217; problems may include:<\/p>\n<ul>\n<li>Objects appear as various shades of gray (this occurs with complete colour blindness and is very rare)<\/li>\n<li>Reduced vision<\/li>\n<li>Nystagmus<\/li>\n<\/ul>\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-1d011d8 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1d011d8\" 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-d80f4d1\" data-id=\"d80f4d1\" 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-9465dca elementor-widget elementor-widget-text-editor\" data-id=\"9465dca\" 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<p><strong>Detection and Diagnosis<\/strong><\/p>\n<p>Colour vision deficiency is most commonly detected with special coloured charts called the Ishihara Test Plates.\u00a0 On each plate is a number composed of coloured dots.\u00a0\u00a0 While holding the chart under good lighting, the patient is asked to identify the number.\u00a0 Once the colour defect is identified, more detailed colour vision tests may be performed.<\/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-886c883 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"886c883\" 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-68ac874\" data-id=\"68ac874\" 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-933344e elementor-widget elementor-widget-text-editor\" data-id=\"933344e\" 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<p><strong>Treatment<\/strong><\/p><p>There is no treatment or cure for colour blindness.\u00a0 Those with mild colour deficiencies learn to associate colours with certain objects and are usually able to identify colour as everyone else does.\u00a0 However, they are unable to appreciate colour in the same way as those with normal colour vision.<\/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\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Colour Blindness Services &gt; Colour Blindness Colour blindness may be a hereditary condition or caused by disease of the optic nerve or retina.&nbsp; Acquired colour vision problems only affect the eye with the disease and may become progressively worse over time.&nbsp; Patients with a colour vision defect caused by disease usually have trouble discriminating blues &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/services\/colour-blindness\/\"> <span class=\"screen-reader-text\">Colour Blindness<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":69,"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":[18],"class_list":["post-1745","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>Colour Blindness - I.C.U. Optometrists<\/title>\n<meta name=\"description\" content=\"Colour blindness may be a hereditary condition or caused by disease of the optic nerve or retina.\" \/>\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\/services\/colour-blindness\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Colour Blindness - I.C.U. Optometrists\" \/>\n<meta property=\"og:description\" content=\"Colour blindness may be a hereditary condition or caused by disease of the optic nerve or retina.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.eyemark.co.za\/demos\/comprehensive\/services\/colour-blindness\/\" \/>\n<meta property=\"og:site_name\" content=\"I.C.U. 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