{"id":493,"date":"2014-11-04T08:58:00","date_gmt":"2014-11-04T07:58:00","guid":{"rendered":"https:\/\/kids.esa.int\/eye-catching_space_technology_restoring_sight\/"},"modified":"2026-10-08T00:28:50","modified_gmt":"2026-10-07T22:28:50","slug":"eye-catching_space_technology_restoring_sight","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/fi\/eye-catching_space_technology_restoring_sight\/","title":{"rendered":"Huomiota her\u00e4tt\u00e4v\u00e4 avaruusteknologia, joka palauttaa n\u00e4\u00f6n"},"content":{"rendered":"<div class=\"lede\">\n<p>Miljoonat ihmiset ymp\u00e4ri maailmaa ovat k\u00e4yneet l\u00e4pi laserleikkauksen n\u00e4\u00f6n korjaamiseksi, mutta tiesitk\u00f6, ett\u00e4 t\u00e4m\u00e4 leikkaus on mahdollista vain avaruusk\u00e4ytt\u00f6\u00f6n kehitetyn teknologian ansiosta?<\/p>\n<\/div>\n<p>Jos katsot tietty\u00e4 pistett\u00e4 samalla kun kallistat tai heilutat p\u00e4\u00e4t\u00e4si, silm\u00e4si pysyv\u00e4t automaattisesti paikallaan, mink\u00e4 ansiosta n\u00e4et selv\u00e4sti my\u00f6s liikkuessasi. Suurimmalla osalla maapallon lajeista on t\u00e4m\u00e4 kyky, ja se ulottuu jopa dinosaurusten aikaan asti. Se on luonnon hieno temppu, jota emme edes ajattele.<\/p>\n<p>Kulissien takana aivosi vastaanottavat jatkuvasti viestej\u00e4 sis\u00e4korvastasi. N\u00e4m\u00e4 viestit kertovat sinulle, mik\u00e4 suunta on mik\u00e4, ja auttavat sinua s\u00e4ilytt\u00e4m\u00e4\u00e4n tasapainosi ja pit\u00e4m\u00e4\u00e4n n\u00e4k\u00f6kentt\u00e4si vakaana. T\u00e4m\u00e4 on mahdollista painovoiman ansiosta, joka kertoo meille, mik\u00e4 suunta on alasp\u00e4in.<\/p>\n<p>Mutta miten astronautit p\u00e4rj\u00e4\u00e4v\u00e4t avaruudessa, jossa ei ole painovoimaa? Miten heid\u00e4n silm\u00e4ns\u00e4 pystyv\u00e4t tarkentamaan tietokoneen n\u00e4ytt\u00f6\u00f6n, kun he leijuvat kansainv\u00e4lisell\u00e4 avaruusasemalla?<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"1024\" data-credit=\"ESA\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/11\/Tracking_device\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2014\/11\/tracking_device\/17895683-2-eng-GB\/Tracking_device.jpg\" alt=\"\"><\/figure>\n<p>T\u00e4m\u00e4n ilmi\u00f6n tutkimiseksi tutkijat kehittiv\u00e4t erityisen laitteen, jolla voidaan mitata astronauttien silm\u00e4nliikkeit\u00e4 h\u00e4iritsem\u00e4tt\u00e4 heid\u00e4n toimintaansa. Laitetta kutsutaan silm\u00e4nliikkeen seurantalaitteeksi (Eye Tracking Device). Se on pohjimmiltaan kyp\u00e4r\u00e4, jossa on kamera, joka ottaa kuvia astronauttien silmist\u00e4 ja tallentaa, mihin he katsovat.<\/p>\n<p>Maapallolla juuri t\u00e4m\u00e4 sama silm\u00e4nliikkeen seurantalaitteisto on tarjonnut l\u00e4\u00e4k\u00e4reille keinon suorittaa tarkkoja laserleikkauksia, jotka ovat parantaneet miljoonien ihmisten el\u00e4m\u00e4nlaatua!<\/p>\n<p><b>Mielenkiintoinen fakta:<\/b> Avaruusteknologia on vaikuttanut jokap\u00e4iv\u00e4iseen el\u00e4m\u00e4\u00e4mme lukuisilla tavoilla. Jotkut vaikutukset ovat suuria, kuten mahdollisuus l\u00e4hett\u00e4\u00e4 tietoa ymp\u00e4ri maailmaa sekunneissa ja tekoj\u00e4senten kehitt\u00e4minen. Toiset taas ovat pienempi\u00e4, kuten mukavat keng\u00e4npohjalliset ja muistivaahtopatjat.<\/p>","protected":false},"excerpt":{"rendered":"<p>Millions of people around the world have had laser surgery to correct their eyesight, but did you know this surgery is only possible thanks to technology developed for use in [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2014\/11\/human_eye2\/17874038-2-eng-GB\/Human_eye.jpg","esa_banner_description":"","esa_banner_credit":"ESA","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2014\/11\/Human_eye2","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[26],"tags":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-493","post","type-post","status-publish","format-standard","hentry","category-news"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/493","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/comments?post=493"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/493\/revisions"}],"predecessor-version":[{"id":4514,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/posts\/493\/revisions\/4514"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/media?parent=493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/categories?post=493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/tags?post=493"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/panel?post=493"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/language?post=493"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/age?post=493"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/duration?post=493"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/resource_type?post=493"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/audience?post=493"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/fi\/wp-json\/wp\/v2\/wf_post_folders?post=493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}