{"id":1583,"date":"2024-06-18T13:46:52","date_gmt":"2024-06-18T13:46:52","guid":{"rendered":"http:\/\/staging.livision-optika.com\/edukativni-centar\/sarenica-iris\/"},"modified":"2024-11-11T08:11:23","modified_gmt":"2024-11-11T08:11:23","slug":"sarenica-iris","status":"publish","type":"post","link":"https:\/\/livision-optika.com\/edukativni-centar\/sarenica-iris\/","title":{"rendered":"\u0160arenica (iris)"},"content":{"rendered":"<p><span style=\"font-weight: bold;\">\u0160arenica ili iris (<span style=\"font-style: italic;\">lat. iris<\/span>) prednji je dio srednje o\u010dne ovojnice, najupe\u010datljiviji po \u010dinjenici da sadr\u017ei pigment kojim se odre\u0111uje boja oka, a spre\u010dava ulazak prevelikih koli\u010dina svjetla u oko kao blenda u fotoaparatu.<\/span> <\/p>\n<p>U njenom sredi\u0161tu se nalazi okrugli otvor, odnosno zjenica (<span style=\"font-style: italic;\">lat. pupilla<\/span>). S obzirom na to da u \u0161arenici postoje i mi\u0161i\u0107ne niti, zjenica se mo\u017ee \u0161iriti i su\u017eavati. <span style=\"font-style: italic;\">Musculus dilatator pupillae<\/span> (mi\u0161i\u0107 rasteza\u010d zjenice) \u0161iri zjenicu, a <span style=\"font-style: italic;\">musculus sphincter pupillae<\/span> (mi\u0161i\u0107 steza\u010d zjenice) su\u017eava zjenicu, tako da njihov rad mo\u017ee promijeniti promjer zjenice. <\/p>\n<p>U \u0161arenici su prisutne i niti autonomnog \u017eiv\u010danog sistema pa se zjenica kod odre\u0111enih vrsta senzacija \u0161iri (strah, ljubav) ili su\u017eava. \u0160arenica je povezana i s fokusiranjem pa \u0107e, kad se gleda bli\u017ei predmet, suziti zjenicu kako bi se pove\u0107ala o\u0161trina slike. <\/p>\n<p>Za razli\u010ditu boju \u0161arenice zaslu\u017ean je pigment, boja ovisi o koli\u010dini i rasporedu pigmenta. Vi\u0161e pigmenta zna\u010di tamnije o\u010di, a manje pigmenta svijetlije o\u010di. Kao \u0161to su otisci prsta individualni i jedinstveni, tako je i svaka \u0161arenica individualna u svakog \u010dovjeka. Nemogu\u0107e je kopirati \u0161arenicu kako bi se prevarila indentifikacija stoga se sve vi\u0161e korsti u za\u0161titnim sistemima kao \u0161to su alarmi trezori i sl.<\/p>\n<p>Ukoliko nismo zadovljni svojom bojom \u0161arenice, mo\u017eemo ju promjeniti no\u0161enjem kontaktne le\u0107e u boji. Svakako je potrebno prije po\u010detka no\u0161enja kontaktnih le\u0107a obaviti kontrolni pregled kako bi odabrale odgovaraju\u0107e kontaktne le\u0107e te se vidjelo kako ih oko podnosi, da nebi do\u0161lo do povrede oka.<\/p>\n<p>Srednju o\u010dnu ovojnicu koju sa\u010dinjavaju \u0161arenica, zrakasto tijelo i \u017eilnica nazivamo uvea, a njenu upalu uveitis. Iridociklitis predstavlja upalne promjene \u0161arenice (<span style=\"font-style: italic;\">iris<\/span>) i zrakostog tijela (<span style=\"font-style: italic;\">corpus ciliare<\/span>) istovremeno. Budu\u0107i da su \u0161arenica i zrakasto tijelo u vrlo bliskom anatomskom odnosu, upalni proces obi\u010dno zahva\u0107a oboje u isto vrijeme, \u0161to se jo\u0161 naziva i prednji uveitis (<span style=\"font-style: italic;\">Uveitis anterior<\/span>).<\/p>\n<p><span style=\"font-weight: bold;\">Podjela uveitisa prema uzroku nastanka:<\/span><\/p>\n<ul>\n<li>Egzogeni uveitis<\/li>\n<li>Endogeni uveitis<\/li>\n<li>Infekcije mikroorganizmima<\/li>\n<li>Neinfektni uveitis<\/li>\n<\/ul>\n<p><span style=\"font-style: italic;\">Autor:<br \/>bc. Livio Svr\u017enjak, optometrist<\/p>\n<p>Literatura:<\/span><br \/>mr. sc. Pavan dr. Jo\u0161ko, &#8220;Bolesti oka&#8221;, Zagreb 2003.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0160arenica ili iris (lat. iris) prednji je dio srednje o\u010dne ovojnice, najupe\u010datljiviji po \u010dinjenici da sadr\u017ei pigment kojim se odre\u0111uje boja oka, a spre\u010dava ulazak prevelikih koli\u010dina svjetla u oko kao blenda u fotoaparatu. U njenom sredi\u0161tu se nalazi okrugli otvor, odnosno zjenica (lat. pupilla). S obzirom na to da u \u0161arenici postoje i mi\u0161i\u0107ne [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2669,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[18],"tags":[],"class_list":["post-1583","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-anatomija-oka"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u0160arenica (iris)<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/livision-optika.com\/edukativni-centar\/sarenica-iris\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0160arenica (iris)\" \/>\n<meta property=\"og:description\" content=\"\u0160arenica ili iris (lat. iris) prednji je dio srednje o\u010dne ovojnice, najupe\u010datljiviji po \u010dinjenici da sadr\u017ei pigment kojim se odre\u0111uje boja oka, a spre\u010dava ulazak prevelikih koli\u010dina svjetla u oko kao blenda u fotoaparatu. 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