{"id":1526,"date":"2015-11-17T07:40:46","date_gmt":"2015-11-17T07:40:46","guid":{"rendered":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/?p=1526"},"modified":"2016-12-10T10:00:21","modified_gmt":"2016-12-10T10:00:21","slug":"destination-loeil-humain-la-cornee-et-le-cristallin-liris-la-retine","status":"publish","type":"post","link":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/2015\/11\/17\/destination-loeil-humain-la-cornee-et-le-cristallin-liris-la-retine\/","title":{"rendered":"Destination l&rsquo;\u0153il humain = la corn\u00e9e et le cristallin"},"content":{"rendered":"<p>Travail r\u00e9alis\u00e9 par Marine, une \u00e9l\u00e8ve de quatri\u00e8me :<\/p>\n<p>La r\u00e9alisation de la maquette d&rsquo;oeil (<a title=\"Activit\u00e9 pr\u00e9c\u00e9dente = r\u00e9alisation d'une maquette d'oeil\" href=\"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/2015\/10\/05\/la-description-de-loeil\/\">article du 5 octobre<\/a>), nous a permis de rep\u00e9rer des \u00e9l\u00e9ments particuli\u00e8rement importants : la corn\u00e9e, l&rsquo;iris, le cristallin et la r\u00e9tine.<\/p>\n<p><strong><span style=\"text-decoration: underline\">R\u00f4le de la corn\u00e9e :<\/span><\/strong><br \/>\n<strong><\/strong>La corn\u00e9e est la partie ant\u00e9rieure transparente de l&rsquo;oeil dont le r\u00f4le est de capter et de focaliser la lumi\u00e8re sur le cristallin.<\/p>\n<p><span style=\"text-decoration: underline\"><strong>R\u00f4le \u00a0du cristallin :<\/strong><\/span><br \/>\nLe cristallin est une lentille biologique servant \u00e0 l&rsquo;accommodation (\u00ab\u00a0la mise au point\u00a0\u00bb) sur l&rsquo;objet que l&rsquo;on regarde.<\/p>\n<p><strong><span style=\"text-decoration: underline\">Exp\u00e9rience illustrant le fonctionnement du cristallin :<\/span><\/strong><br \/>\n&#8211; prendre un stylo dans chacune de vos mains ;<br \/>\n&#8211; positionner l&rsquo;une de vos mains \u00e0 environ 30 cm devant vous de fa\u00e7on \u00e0 ce que le stylo soit \u00e0 hauteur d&rsquo;yeux ;<br \/>\n&#8211; positionner votre deuxi\u00e8me main bras tendu devant vous, toujours stylo \u00e0 hauteur d&rsquo;yeux.<\/p>\n<p><a href=\"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-content\/uploads\/sites\/169\/2015\/11\/Accommodation.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1542\" src=\"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-content\/uploads\/sites\/169\/2015\/11\/Accommodation-300x232.jpg\" alt=\"\" width=\"300\" height=\"232\" srcset=\"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-content\/uploads\/sites\/169\/2015\/11\/Accommodation-300x232.jpg 300w, https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-content\/uploads\/sites\/169\/2015\/11\/Accommodation.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><span style=\"color: #333399\"><strong><em><span style=\"text-decoration: underline\">Constat num\u00e9ro 1 :<\/span> on ne voit pas net les deux stylos en m\u00eame temps.<\/em><\/strong><\/span><\/p>\n<p>Remarque : pour voir les stylos nets en m\u00eame temps il faut les mettre tous les deux c\u00f4te \u00e0 c\u00f4te.<\/p>\n<p><span style=\"color: #333399\"><strong><em><span style=\"text-decoration: underline\">Constat num\u00e9ro 2 : <\/span>la nettet\u00e9 est presque imm\u00e9diate. Il faut quand m\u00eame une fraction de seconde pour que le cristallin fasse l&rsquo;accommodation.<\/em><\/strong><\/span><\/p>\n<p>Une courte vid\u00e9o pour ceux qui veulent en savoir un peu plus sur le processus de l&rsquo;accommodation :<\/p>\n<p><strong><span style=\"color: #000000;font-size: small\"><br \/>\n<iframe loading=\"lazy\" title=\"Accommodation de l&#039;oeil\" width=\"474\" height=\"267\" src=\"https:\/\/www.youtube.com\/embed\/4rjXUWpoZgE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/>\n<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Travail r\u00e9alis\u00e9 par Marine, une \u00e9l\u00e8ve de quatri\u00e8me : La r\u00e9alisation de la maquette d&rsquo;oeil (article du 5 octobre), nous a permis de rep\u00e9rer des \u00e9l\u00e9ments particuli\u00e8rement importants : la corn\u00e9e, l&rsquo;iris, le cristallin et la r\u00e9tine. R\u00f4le de la corn\u00e9e : La corn\u00e9e est la partie ant\u00e9rieure transparente de l&rsquo;oeil dont le r\u00f4le est &hellip; <a href=\"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/2015\/11\/17\/destination-loeil-humain-la-cornee-et-le-cristallin-liris-la-retine\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Destination l&rsquo;\u0153il humain = la corn\u00e9e et le cristallin<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":3930,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"h5ap_radio_sources":[],"footnotes":""},"categories":[53],"tags":[],"post_folder":[],"class_list":["post-1526","post","type-post","status-publish","format-standard","hentry","category-destination-sciences"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/posts\/1526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/users\/3930"}],"replies":[{"embeddable":true,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/comments?post=1526"}],"version-history":[{"count":0,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/posts\/1526\/revisions"}],"wp:attachment":[{"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/media?parent=1526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/categories?post=1526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/tags?post=1526"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/passerelle2.ac-nantes.fr\/ecole-hopital-nantes\/wp-json\/wp\/v2\/post_folder?post=1526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}