G\u00f6z yuvarla\u011f\u0131, yakla\u015f\u0131k 2 cm \u00e7ap\u0131nda k\u00fcresel bi\u00e7imdedir. K\u0131vaml\u0131 bir s\u0131v\u0131yla doludur ve d\u0131\u015f y\u00fczeyi (\u00f6n taraftaki saydam kornea k\u0131sm\u0131n\u0131n d\u0131\u015f\u0131nda) beyaz bir dokuyla \u00e7evrilidir. Kornean\u0131n (saydam tabaka) d\u0131\u015fb\u00fckey y\u00fczeyi conjunctivia ile kaplanm\u0131\u015ft\u0131r.<\/p>\n
Merce\u011fin \u015feklini kirpik alt\u0131 kaslar\u0131 de\u011fi\u015ftirir. Kornean\u0131n d\u0131\u015f b\u00fckeyli\u011fi g\u00f6z\u00fcn odaklanmas\u0131n\u0131n \u00f6nemli bir b\u00f6l\u00fcm\u00fcn\u00fc ger\u00e7ekle\u015ftiren, kirpik alt\u0131 kaslar\u0131 merce\u011fin \u015feklini, d\u0131\u015f g\u00f6z kaslar\u0131 da g\u00f6z yuvarla\u011f\u0131n\u0131n \u015feklini de\u011fi\u015ftirerek odaklanmay\u0131 tam olarak sa\u011flarlar.<\/p>\n
\u0130ris, merce\u011fin \u00f6n\u00fcnde yer al\u0131r. G\u00f6z bebe\u011fi (merce\u011fin \u00f6n\u00fcndeki dairesel bo\u015fluk), gerekti\u011finde g\u00f6z\u00fc fazla \u0131\u015f\u0131ktan korumak i\u00e7in b\u00fcy\u00fct\u00fcp k\u00fc\u00e7\u00fcltebilir. G\u00f6rme siniri, \u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccrelerin beyinle ili\u015fkisini sa\u011flar. G\u00f6rme sinirinin g\u00f6ze giri\u015f noktas\u0131, \u0131\u015f\u0131\u011fa duyars\u0131z oldu\u011fundan \u201ck\u00f6r nokta\u201d olarak bilinir.<\/p>\n
Retina, \u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccrelerin (k\u0131rm\u0131z\u0131, ye\u015fil ve mavi i\u00e7in) koniler (cones) ve (griden beyaza kadar tonlar i\u00e7in) \u00e7omaklardan (rods) olu\u015fur. Mak\u00fcla, g\u00f6z rahat bir konumdayken \u0131\u015f\u0131\u011f\u0131n do\u011fal olarak d\u00fc\u015ft\u00fc\u011f\u00fc noktad\u0131r. A\u011f tabaka \u00e7ukuru (fovea) ise mak\u00fclan\u0131n merkezidir. Yo\u011fun olarak konilerle (\u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccreler) kapl\u0131d\u0131r ve i\u015flevi net g\u00f6r\u00fc\u015f sa\u011flamakt\u0131r. \u0130ki g\u00f6z birlikte \u00e7al\u0131\u015f\u0131r ve (biocular) g\u00f6rsel bilgiyi g\u00f6rsel korteks arac\u0131l\u0131\u011f\u0131yla, \u00fc\u00e7 boyutlu olarak alg\u0131lamaya d\u00f6n\u00fc\u015ft\u00fcren beyne iletir.<\/p>\n
<\/p>\n
retina<\/p>\n
Retina (a\u011f tabaka), \u0131\u015f\u0131\u011fa duyarl\u0131 koni ve \u00e7omaklar\u0131 da i\u00e7eren sinir h\u00fccrelerinden olu\u015fan ince bir tabakad\u0131r. Bu h\u00fccreler \u0131\u015f\u0131\u011f\u0131 elektrik darbelerine, yani beynin anlad\u0131\u011f\u0131 dile \u00e7evirirler.<\/p>\n
I\u015f\u0131\u011fa duyarl\u0131 h\u00fccreler mikroskop alt\u0131ndaki g\u00f6r\u00fcn\u00fc\u015flerine g\u00f6re iki tipe ayr\u0131l\u0131r: \u00e7omaklar ve koniler. Retinan\u0131n yan taraf\u0131na rahat\u00e7a ay\u0131rt edilirler. Ancak orta b\u00f6l\u00fcmde \u00e7ok i\u00e7 i\u00e7e girmi\u015f durumdad\u0131rlar.<\/p>\n
Koniler g\u00fcn\u0131\u015f\u0131\u011f\u0131nda renkli g\u00f6rmemizi, \u00e7omaklar ise az \u015f\u0131kta ve sadece grinin tonlar\u0131 halinde g\u00f6rmemizi sa\u011flarlar. G\u00fcn \u0131\u015f\u0131\u011f\u0131nda koniler yard\u0131m\u0131yla g\u00f6rmeye \u201cfotopik\u201d; \u00e7omaklarla az \u0131\u015f\u0131kta gr tonlar\u0131 ile g\u00f6rmeye ise \u201cskotopik\u201d diyoruz.<\/p>\n
\u201cMerkez alanda koniler a\u015fa\u011f\u0131 yukar\u0131 100 mikron (metrenin milyonda biri) kal\u0131nl\u0131\u011f\u0131nda bir tabaka olu\u015fturur. Bu yakla\u015f\u0131k yirmi derece bir a\u00e7\u0131 yapar. Bir s\u0131rada 50 civar\u0131nda koni bulunur. Bu alan dairesel de\u011fil, uzun aks\u0131 yatay olan eliptik bir \u015fekildedir ve 2000 civar\u0131nda koni i\u00e7erir.\u201d<\/em><\/p>\n En k\u00fc\u00e7\u00fck h\u00fccre bir mikron, yani iki k\u0131rm\u0131z\u0131 \u0131\u015f\u0131k dalga boyu, konilerin say\u0131s\u0131 12 milyon kadard\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":" G\u00f6z yuvarla\u011f\u0131, yakla\u015f\u0131k 2 cm \u00e7ap\u0131nda k\u00fcresel bi\u00e7imdedir. K\u0131vaml\u0131 bir s\u0131v\u0131yla doludur ve d\u0131\u015f y\u00fczeyi (\u00f6n taraftaki saydam kornea k\u0131sm\u0131n\u0131n d\u0131\u015f\u0131nda) beyaz bir dokuyla \u00e7evrilidir. Kornean\u0131n (saydam tabaka) d\u0131\u015fb\u00fckey y\u00fczeyi conjunctivia ile kaplanm\u0131\u015ft\u0131r. Merce\u011fin \u015feklini kirpik alt\u0131 kaslar\u0131 de\u011fi\u015ftirir. Kornean\u0131n d\u0131\u015f b\u00fckeyli\u011fi g\u00f6z\u00fcn odaklanmas\u0131n\u0131n \u00f6nemli bir b\u00f6l\u00fcm\u00fcn\u00fc ger\u00e7ekle\u015ftiren, kirpik alt\u0131 kaslar\u0131 merce\u011fin \u015feklini, d\u0131\u015f g\u00f6z kaslar\u0131 da g\u00f6z yuvarla\u011f\u0131n\u0131n \u015feklini de\u011fi\u015ftirerek odaklanmay\u0131 tam olarak sa\u011flarlar. \u0130ris, merce\u011fin \u00f6n\u00fcnde yer al\u0131r. G\u00f6z bebe\u011fi (merce\u011fin \u00f6n\u00fcndeki dairesel bo\u015fluk), gerekti\u011finde g\u00f6z\u00fc fazla \u0131\u015f\u0131ktan korumak i\u00e7in b\u00fcy\u00fct\u00fcp k\u00fc\u00e7\u00fcltebilir. G\u00f6rme siniri, \u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccrelerin beyinle ili\u015fkisini sa\u011flar. G\u00f6rme sinirinin g\u00f6ze giri\u015f noktas\u0131, \u0131\u015f\u0131\u011fa duyars\u0131z oldu\u011fundan \u201ck\u00f6r nokta\u201d olarak bilinir. Retina, \u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccrelerin (k\u0131rm\u0131z\u0131, ye\u015fil ve mavi i\u00e7in) koniler (cones) ve (griden beyaza kadar tonlar i\u00e7in) \u00e7omaklardan (rods) olu\u015fur. Mak\u00fcla, g\u00f6z rahat bir konumdayken \u0131\u015f\u0131\u011f\u0131n do\u011fal olarak d\u00fc\u015ft\u00fc\u011f\u00fc noktad\u0131r. A\u011f tabaka \u00e7ukuru (fovea) ise mak\u00fclan\u0131n merkezidir. Yo\u011fun olarak konilerle (\u0131\u015f\u0131\u011fa duyarl\u0131 h\u00fccreler) kapl\u0131d\u0131r ve i\u015flevi net g\u00f6r\u00fc\u015f sa\u011flamakt\u0131r. \u0130ki g\u00f6z birlikte \u00e7al\u0131\u015f\u0131r ve (biocular) g\u00f6rsel bilgiyi g\u00f6rsel korteks arac\u0131l\u0131\u011f\u0131yla, \u00fc\u00e7 boyutlu olarak alg\u0131lamaya d\u00f6n\u00fc\u015ft\u00fcren beyne iletir. retina Retina (a\u011f tabaka), \u0131\u015f\u0131\u011fa duyarl\u0131 koni ve \u00e7omaklar\u0131 da i\u00e7eren sinir h\u00fccrelerinden olu\u015fan ince bir tabakad\u0131r. Bu h\u00fccreler \u0131\u015f\u0131\u011f\u0131 elektrik darbelerine, yani beynin anlad\u0131\u011f\u0131 dile \u00e7evirirler. I\u015f\u0131\u011fa duyarl\u0131 h\u00fccreler mikroskop alt\u0131ndaki g\u00f6r\u00fcn\u00fc\u015flerine g\u00f6re iki tipe ayr\u0131l\u0131r: \u00e7omaklar ve koniler. Retinan\u0131n yan taraf\u0131na rahat\u00e7a ay\u0131rt edilirler. Ancak orta b\u00f6l\u00fcmde \u00e7ok i\u00e7 i\u00e7e girmi\u015f durumdad\u0131rlar. Koniler g\u00fcn\u0131\u015f\u0131\u011f\u0131nda renkli g\u00f6rmemizi, \u00e7omaklar ise az \u015f\u0131kta ve sadece grinin tonlar\u0131 halinde g\u00f6rmemizi sa\u011flarlar. G\u00fcn \u0131\u015f\u0131\u011f\u0131nda koniler yard\u0131m\u0131yla g\u00f6rmeye \u201cfotopik\u201d; \u00e7omaklarla az \u0131\u015f\u0131kta gr tonlar\u0131 ile g\u00f6rmeye ise \u201cskotopik\u201d diyoruz. \u201cMerkez alanda koniler a\u015fa\u011f\u0131 yukar\u0131 100 mikron (metrenin milyonda biri) kal\u0131nl\u0131\u011f\u0131nda bir tabaka olu\u015fturur. Bu yakla\u015f\u0131k yirmi derece bir a\u00e7\u0131 yapar. Bir s\u0131rada 50 civar\u0131nda koni bulunur. Bu alan dairesel de\u011fil, uzun aks\u0131 yatay olan eliptik bir \u015fekildedir ve 2000 civar\u0131nda koni i\u00e7erir.\u201d En k\u00fc\u00e7\u00fck h\u00fccre bir mikron, yani iki k\u0131rm\u0131z\u0131 \u0131\u015f\u0131k dalga boyu, konilerin say\u0131s\u0131 12 milyon kadard\u0131r.<\/p>\n","protected":false},"author":1,"featured_media":209,"comment_status":"closed","ping_status":"closed","sticky":true,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-yazilar"],"_links":{"self":[{"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/posts\/152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=152"}],"version-history":[{"count":1,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/posts\/152\/revisions"}],"predecessor-version":[{"id":153,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/posts\/152\/revisions\/153"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=\/wp\/v2\/media\/209"}],"wp:attachment":[{"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eyefitturkey.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}