[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.george-dennis.cz\/zdravy-zrak\/#Article","mainEntityOfPage":"https:\/\/www.george-dennis.cz\/zdravy-zrak\/","headline":"Zdrav\u00fd zrak","name":"Zdrav\u00fd zrak","description":"\u0158\u00edk\u00e1 se, \u017ee zrakem z\u00edsk\u00e1v\u00e1me snad a\u017e osmdes\u00e1t procent informac\u00ed o okoln\u00edm sv\u011bt\u011b. N\u00e1\u0161 zrak je velmi komplexn\u00ed a slo\u017eit\u00fd apar\u00e1t, jen\u017ee my si jej t\u00e9m\u011b\u0159 soustavn\u011b ni\u010d\u00edme dne\u0161n\u00edm zp\u016fsobem \u017eivota. Na\u0161e o\u010dn\u00ed bulvy maj\u00ed mnoho vrstev, ta \u00fapln\u011b nejnitern\u011bj\u0161\u00ed se naz\u00fdv\u00e1 retina, tedy s\u00edtnice. Zde jsou ulo\u017eeny speci\u00e1ln\u00ed bu\u0148ky, kter\u00e9 um\u00ed reagovat na sv\u011btlo. V\u00a0moment\u011b, kdy na n\u011b sv\u011btlo<br><br><a class=\"more-link\" href=\"https:\/\/www.george-dennis.cz\/zdravy-zrak\/\">Read More<\/a>","datePublished":"2024-04-27","dateModified":"2024-04-27","author":{"@type":"Person","@id":"https:\/\/www.george-dennis.cz\/author\/#Person","name":"","url":"https:\/\/www.george-dennis.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/5522eb0fc8481dea5f6519f6a0b15ee2c46358d48429b281fd7c49cbb5a929f9?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/5522eb0fc8481dea5f6519f6a0b15ee2c46358d48429b281fd7c49cbb5a929f9?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"george-dennis.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.george-dennis.cz\/wp-content\/uploads\/zrak.jpg","url":"https:\/\/www.george-dennis.cz\/wp-content\/uploads\/zrak.jpg","height":0,"width":0},"url":"https:\/\/www.george-dennis.cz\/zdravy-zrak\/","about":["Zdrav\u00ed"],"wordCount":419,"articleBody":"\u0158\u00edk\u00e1 se, \u017ee zrakem z\u00edsk\u00e1v\u00e1me snad a\u017e osmdes\u00e1t procent informac\u00ed o okoln\u00edm sv\u011bt\u011b. N\u00e1\u0161 zrak je velmi komplexn\u00ed a slo\u017eit\u00fd apar\u00e1t, jen\u017ee my si jej t\u00e9m\u011b\u0159 soustavn\u011b ni\u010d\u00edme dne\u0161n\u00edm zp\u016fsobem \u017eivota. Na\u0161e o\u010dn\u00ed bulvy maj\u00ed mnoho vrstev, ta \u00fapln\u011b nejnitern\u011bj\u0161\u00ed se naz\u00fdv\u00e1 retina, tedy s\u00edtnice. Zde jsou ulo\u017eeny speci\u00e1ln\u00ed bu\u0148ky, kter\u00e9 um\u00ed reagovat na sv\u011btlo. V\u00a0moment\u011b, kdy na n\u011b sv\u011btlo zasv\u00edt\u00ed, dojde ke vzniku\u00a0tzv. ak\u010dn\u00edho potenci\u00e1l\u016f. Takov\u00fd potenci\u00e1l funguje asi jako depe\u0161e, kterou si neurony mezi sebou p\u0159ed\u00e1vaj\u00ed. Z\u00a0bun\u011bk v\u00a0s\u00edtnici se tak potenci\u00e1l dost\u00e1v\u00e1 na bu\u0148ky, kter\u00e9 tvo\u0159\u00ed nervus opticus, tedy zrakov\u00fd nerv. Nerv z\u00a0jedn\u00e9 a druh\u00e9 strany se speci\u00e1ln\u011b k\u0159\u00ed\u017e\u00ed, tak\u017ee sm\u011brem do zrakov\u00fdch center v\u00a0mozku m\u00ed\u0159\u00ed informace speci\u00e1ln\u00edm zp\u016fsobem. Po zk\u0159\u00ed\u017een\u00ed jsou toti\u017e v\u00a0jednom tzv. tactus opticus vedeny informace ze stejn\u00fdch polovin s\u00edtnice obou o\u010d\u00ed. Takto jede tedy na ka\u017ed\u00e9 stran\u011b mozku trakt sm\u011brem do t\u00fdln\u00edch lalok\u016f mozku, kde se informace zpracov\u00e1vaj\u00ed. Po cest\u011b ale vyd\u00e1v\u00e1 je\u0161t\u011b r\u016fzn\u00e9 odbo\u010dky, d\u00edky kter\u00fdm jsou jednotliv\u00e9 oblasti mozku v\u00fdznamn\u011b propojeny. Nap\u0159\u00edklad, d\u00edky takov\u00fdm spojk\u00e1m je mo\u017en\u00e9, abychom spr\u00e1vn\u011b dr\u017eeli rovnov\u00e1hu, m\u016f\u017eeme sledovat ob\u011bma o\u010dima nar\u00e1z jeden p\u0159edm\u011bt, ani\u017e bychom museli p\u0159em\u00fd\u0161let nad t\u00edm, \u017ee n\u011bco takov\u00e9ho d\u011bl\u00e1me. D\u016fle\u017eit\u00e9 ale je, abychom si zdrav\u00e9 o\u010di udr\u017eeli po co nejdel\u0161\u00ed dobu na\u0161eho \u017eivota. Je p\u0159irozen\u00e9, \u017ee se vzr\u016fstaj\u00edc\u00edm v\u011bkem p\u0159est\u00e1v\u00e1me tak dob\u0159e vid\u011bt do bl\u00edzka. To je d\u00e1no st\u00e1rnut\u00edm cel\u00e9ho o\u010dn\u00edho apar\u00e1tu, kter\u00fd u\u017e tak dob\u0159e nebude um\u011bt zaost\u0159ovat. Pro na\u0161e o\u010di je dobr\u00e9, pokud se st\u0159\u00edd\u00e1 pozorov\u00e1n\u00ed bl\u00edzk\u00fdch a vzd\u00e1len\u00fdch p\u0159edm\u011bt\u016f. Tak\u017ee, proch\u00e1zky po venku jsou velmi dobr\u00fdm a kvalitn\u00edm cvi\u010den\u00edm. Stejn\u011b tak i pravideln\u00e9 n\u00e1v\u0161t\u011bvy u oftalmologa jsou vhodn\u00e9 preventivn\u00ed opat\u0159en\u00ed. Ten m\u016f\u017ee toti\u017e p\u0159ij\u00edt na r\u016fzn\u00e9 dal\u0161\u00ed probl\u00e9my, jako jsou nap\u0159\u00edklad glaukomy nebo i (vz\u00e1cn\u00e1) n\u00e1dorov\u00e1 onemocn\u011bn\u00ed.                                                                                                                                                                                                                                                                                                                                                                                                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