{"id":1134,"date":"2024-03-13T19:12:36","date_gmt":"2024-03-13T19:12:36","guid":{"rendered":"https:\/\/edb.luf.temporary.site\/wp1\/?p=1134"},"modified":"2024-04-08T23:52:57","modified_gmt":"2024-04-08T23:52:57","slug":"retina","status":"publish","type":"post","link":"https:\/\/humanhealthandhygiene.com\/wp1\/2024\/03\/13\/retina\/","title":{"rendered":"Retina"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1134\" class=\"elementor elementor-1134\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a36b3f4 e-flex e-con-boxed e-con e-parent\" data-id=\"a36b3f4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c76806f elementor-widget elementor-widget-text-editor\" data-id=\"c76806f\" data-element_type=\"widget\" data-e-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><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-6064 alignright\" src=\"http:\/\/humanhealthandhygiene.com\/wp1\/wp-content\/uploads\/2024\/04\/Retina-300x233.jpg\" alt=\"\" width=\"300\" height=\"233\" srcset=\"https:\/\/humanhealthandhygiene.com\/wp1\/wp-content\/uploads\/2024\/04\/Retina-300x233.jpg 300w, https:\/\/humanhealthandhygiene.com\/wp1\/wp-content\/uploads\/2024\/04\/Retina-768x597.jpg 768w, https:\/\/humanhealthandhygiene.com\/wp1\/wp-content\/uploads\/2024\/04\/Retina.jpg 790w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p><p>The retina is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of the visual world on the retina (through the cornea and lens), which serves much the same function as the film in a camera. Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses. These are sent to various visual centres of the brain through the fibres of the optic nerve. Neural retina typically refers to three layers of neural cells (photo receptor cells, bipolar cells, and ganglion cells) within the retina, while the entire retina refers to these three layers plus a layer of pigmented epithelial cells.<\/p><p>In vertebrate embryonic development, the retina and the optic nerve originate as outgrowths of the developing brain, specifically the embryonic diencephalon; thus, the retina is considered part of the central nervous system (CNS) and is actually brain tissue. It is the only part of the CNS that can be visualized non-invasively.<\/p><p>The retina is a layered structure with several layers of neurons interconnected by synapses. The only neurons that are directly sensitive to light are the photoreceptor cells. For vision, these are of two types: the rods and cones. Rods function mainly in dim light and provide black-and-white vision while cones support the perception of colour. A third type of photoreceptor, the photosensitive ganglion cells, is important for entrainment and reflexive responses to the brightness of light.<\/p><p>Neural signals from the rods and cones undergo processing by other neurons of the retina. The output takes the form of action potentials in retinal ganglion cells whose axons form the optic nerve. Several important features of visual perception can be traced to the retinal encoding and processing of light.<\/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\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The retina is the third and inner coat of the eye which is a light-sensitive layer of tissue. The optics of the eye create an image of the visual world&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"template-page-builder.php","format":"standard","meta":{"om_disable_all_campaigns":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-1134","post","type-post","status-publish","format-standard","hentry","category-eye"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Retina - Human Health and Hygiene<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/humanhealthandhygiene.com\/wp1\/2024\/03\/13\/retina\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Retina - Human Health and Hygiene\" \/>\n<meta name=\"twitter:description\" content=\"The retina is the third and inner coat of the eye which is a light-sensitive layer of tissue. 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