{"id":98781,"date":"2026-07-14T09:48:29","date_gmt":"2026-07-14T09:48:29","guid":{"rendered":"https:\/\/alqarionline.com\/?p=98781"},"modified":"2026-07-14T09:48:32","modified_gmt":"2026-07-14T09:48:32","slug":"einstaklingssyn-hvernig-thau-virka-auk-otrulegrar-uppbyggingar-vulkan-spiele-bonus-a-islandi-theirra","status":"publish","type":"post","link":"https:\/\/alqarionline.com\/index.php\/2026\/07\/14\/einstaklingssyn-hvernig-thau-virka-auk-otrulegrar-uppbyggingar-vulkan-spiele-bonus-a-islandi-theirra\/","title":{"rendered":"Einstaklingss\u00fdn: Hvernig \u00feau virka, auk \u00f3tr\u00falegrar uppbyggingar vulkan spiele b\u00f3nus \u00e1 \u00cdslandi \u00feeirra"},"content":{"rendered":"<div class=\"toc\" style=\"background: #f9f9f9;border: 1px solid #aaa;display: table;margin-bottom: 1em;padding: 1em;width: 350px;\">\n<p style=\"font-weight: 700;text-align: center;\">Greinar<\/p>\n<ul>\n<li><a href=\"#optic-nerve\">Sj\u00f3nr\u00e6nt mun<\/a><\/li>\n<li><a href=\"#eye-function-and-sight\">Augnstarfsemi og \u00fe\u00fa munt sj\u00e1<\/a><\/li>\n<li><a href=\"#eye-surface-issues\">Sj\u00f3n h\u00fa\u00f0v\u00f6rur<\/a><\/li>\n<li><a href=\"#key-parts-of-the-human-eye\">Leynileg svi\u00f0 athygli mannsins<\/a><\/li>\n<\/ul>\n<\/div>\n<p>N\u00fdja linsupr\u00f3f\u00edlinn er breyttur til a\u00f0 hafa n\u00e1l\u00e6ga sj\u00f3n (gistingu) sem er h\u00e1\u00f0ur n\u00fdjum bifh\u00e1rv\u00f6\u00f0va. St\u00e6r\u00f0 n\u00fdrra nemandans, sem stj\u00f3rnar lj\u00f3smagni sem fer inn \u00ed augun, er stillt af v\u00edkkunarv\u00f6\u00f0va augans og enda\u00fearmslokav\u00f6\u00f0vanum. Sj\u00f3nin er ekki m\u00f3tu\u00f0 eins og fullkomin sv\u00e6\u00f0i; \u00ed sta\u00f0inn er h\u00fan sameinu\u00f0 tveggja hluta eining, sem samanstendur af fremri (fram) hluta og aftari (aftari) hluta. Hvernig sj\u00f3nin myndast \u00fe\u00fd\u00f0ir a\u00f0 sj\u00f3nhimnurnar eru hluti af mi\u00f0taugakerfinu, athuga\u00f0u og m\u00e6nunni. <!--more--> Sj\u00f3nhimnan er a\u00f0alsamband sj\u00f3narinnar og h\u00f6fu\u00f0sins.<\/p>\n<p>Ocelli, eitt af au\u00f0veldustu sj\u00f3narhornunum, er a\u00f0 finna \u00ed hundum, til d\u00e6mis sumum sniglunum. Hversu margar snertilinsur vi\u00f0 svona n\u00e1l\u00e6g\u00f0 voru mismunandi var yfirleitt; einstakir \u00fer\u00edl\u00f3b\u00edtar fengu eina en sumir h\u00f6f\u00f0u \u00fe\u00fasundir linsa fyrir hverja athygli. \u00dear sem hvert auga b\u00fdr til mismunandi mynd, myndast fr\u00e1b\u00e6r samruna, h\u00e1g\u00e6\u00f0a mynd \u00ed huganum. N\u00fdjustu listaverkin \u00ed m\u00f6rgum l\u00edfverum, s\u00e9rstaklega r\u00e1nd\u00fdrum, n\u00e1 yfir h\u00e1a \u00fe\u00e6tti tv\u00edsj\u00f3nar fyrir v\u00ed\u00f0t\u00e6k \u00e1hrif. \u00cd kerfi sem hefur erfi\u00f0ari augu, sendir lj\u00f3sn\u00e6mur ganglionvefur sj\u00f3nhimnu merki me\u00f0fram retinohypothalamic tract til a\u00f0 sty\u00f0ja vi\u00f0 n\u00fdja kj\u00f6r\u00feekjukjarna til a\u00f0 finna fyrir s\u00f3larhringsbreytingum og einnig vi\u00f0 n\u00fdja fortectal sv\u00e6\u00f0i\u00f0 til a\u00f0 takast \u00e1 vi\u00f0 n\u00fdjustu lj\u00f3svi\u00f0br\u00f6g\u00f0 sj\u00e1lsins.<\/p>\n<p>Innri h\u00fa\u00f0in er gegns\u00e6 og hylur n\u00fdja gl\u00e6rkerfi\u00f0, sem berst fr\u00e1 skynfrumum sj\u00f3nhimnunnar. S\u00e9rstakir skord\u00fdr eru me\u00f0 \u00fev\u00ed nafni einlinsu-samsettri augasteini, millibilsger\u00f0 sem er eitthva\u00f0 fr\u00e1 ofurlagsformi n\u00fds fj\u00f6llinsu-samsetts augasteins og einlinsu-steins sem finnst hj\u00e1 d\u00fdrum sem hafa au\u00f0velda sj\u00f3n. Svarta sv\u00e6\u00f0i\u00f0 sem s\u00e9st af sl\u00edkum skord\u00fdrum og vir\u00f0ist \u00fev\u00ed yfirleitt sko\u00f0a sig af \u00e1horfandanum, er kalla\u00f0 gervi-nemandi.<\/p>\n<h2 id=\"optic-nerve\">Sj\u00f3nr\u00e6nt hugrekki: vulkan spiele b\u00f3nus \u00e1 \u00cdslandi<\/h2>\n<ul>\n<li>Athygli \u00fe\u00edn hefur \u00e1hrif \u00e1 l\u00edkamann sem getur valdi\u00f0 l\u00famskum breytingum \u00e1 l\u00f6gun augna \u00feinna og f\u00e6rt f\u00f3kussv\u00e6\u00f0i\u00f0 sem \u00fea\u00f0 lendir \u00e1 r\u00e9ttan h\u00e1tt fyrir sj\u00f3nhimnuna.<\/li>\n<li>Ef sj\u00f3nhreyfingarnar finna hratt skotmark (sakkader), a\u00f0laga \u00fe\u00e6r s\u00fdnileika sinn fr\u00e1 \u00fev\u00ed a\u00f0 a\u00f0laga n\u00fdju lithimnuna og \u00fea\u00f0 a\u00f0lagar st\u00e6r\u00f0 n\u00fdja sj\u00f3naukans.<\/li>\n<li>\u00dea\u00f0 mun krefjast athyglinnar (e\u00f0a annarra skilningarvita, eins og heyrnarinnar og teygjunnar) til a\u00f0 safna uppl\u00fdsingum um \u00fej\u00f3\u00f0ina \u00ed kringum \u00feig.<\/li>\n<li>\u00cd \u00f6\u00f0rum l\u00edfverum, eins og br\u00e1\u00f0, er s\u00e9st a\u00f0 augu auka augnr\u00fdmi, \u00fear \u00e1 me\u00f0al hj\u00e1 kan\u00ednum og jafnvel sm\u00e1hestum, sem hafa einsj\u00f3na athygli.<\/li>\n<li>Augun sem hafa upplausnarorku eru me\u00f0al \u00feeirra 10 mismunandi formanna, flokku\u00f0 eftir efnissj\u00f3n og l\u00e1gefnissj\u00f3n.<\/li>\n<\/ul>\n<p>Me\u00f0 \u00fev\u00ed a\u00f0 breyta l\u00f6gun sinni beinist n\u00fdja linsan hv\u00edtu lj\u00f3si a\u00f0 sj\u00f3nhimnunni. N\u00fdjasta ytra lag augans inniheldur nokku\u00f0 har\u00f0a, hv\u00edta <a href=\"https:\/\/vulkan-spiele-casino.com\/is\/\">vulkan spiele b\u00f3nus \u00e1 \u00cdslandi<\/a> h\u00fa\u00f0 sem kallast hv\u00edtu augans (e\u00f0a lj\u00f3s augans). Augnholi\u00f0 er perulaga bygging sem er m\u00f3tu\u00f0 af nokkrum beinagrindum. \u00deessi tegund rafsegulmerkja fer\u00f0ast um sj\u00f3nhimnuna fr\u00e1 sj\u00f3nhimnunni til heilans.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/casinosulweb.it\/wp-content\/uploads\/Planetwin365-Mobile-1024x492.jpg\" alt=\"vulkan spiele b\u00f3nus \u00e1 \u00cdslandi\" align=\"right\" border=\"1\" ><\/p>\n<p>Tv\u00f6 augu gera heilanum kleift a\u00f0 velja d\u00fdpt og svi\u00f0 hlutar, sem kallast stere\u00f3sj\u00f3n, og veita tilfinningu \u00fat fr\u00e1 \u00fer\u00edv\u00edddarsj\u00f3narhorni \u00e1 sj\u00f3ninni. N\u00fdjasti sj\u00f3nneminn er yfirleitt \u00e1 bilinu 4 mm \u00ed \u00feverm\u00e1li, \u00fe\u00f3 \u00fea\u00f0 s\u00e9 \u00e1 bilinu 2 mm (f\/8.3) \u00e1 bj\u00f6rtum sv\u00e6\u00f0um upp \u00ed 8 mm (f\/2 mm) \u00e1 n\u00f3ttunni. H\u00e6sta stigi\u00f0 \u00ed flokknum er \u00ed bo\u00f0i hva\u00f0 var\u00f0ar venjuleg sj\u00f3nr\u00e6n \u00e1hrif, sem eru 108 k\u00edl\u00f3metrar\/m\u00b2 (100, 100 \u00fe\u00fasund e\u00f0a 100 millj\u00f3nir kandela \u00e1 fermetra). Ferli\u00f0 er \u00f3l\u00ednulegt og fj\u00f6lbreytt, \u00feannig a\u00f0 truflun vegna lj\u00f3sgeisla \u00fe\u00fd\u00f0ir a\u00f0 endurr\u00e6sa n\u00fdjasta svarta sj\u00f3nferli\u00f0. \u00deegar sj\u00f3nin f\u00e6rist hratt upp a\u00f0 augasteini (sakkades), breytir h\u00fan einnig umfangi s\u00ednu me\u00f0 \u00fev\u00ed a\u00f0 skipta um n\u00fdja lithimnuna, sem a\u00f0lagar st\u00e6r\u00f0 n\u00fdja sj\u00e1aldarins.<\/p>\n<h2 id=\"eye-function-and-sight\">Augnform og augu<\/h2>\n<p>Mismunur \u00e1 melan\u00edninnihaldi sk\u00fdrir einnig hvers vegna sumir einstaklingar hafa mismunandi lita\u00f0a lithimnu (heterochromia), sem oft er aflei\u00f0ing af hef\u00f0bundinni erf\u00f0abreytingu sem hefur \u00e1hrif \u00e1 melan\u00ednv\u00f6xt \u00ed auganu. Reyndar innihalda svartar lithimnur mun meira af au\u00f0vita\u00f0 br\u00fanleitu, lj\u00f3sgleypandi litarefninu melan\u00edni &#8211; svipu\u00f0u litarefni sem gefur h\u00fa\u00f0inni a\u00f0ra liti. N\u00fdleg leit \u00fe\u00fd\u00f0ir a\u00f0 \u00fea\u00f0 eru a\u00f0 minnsta kosti 61 fj\u00f6lskyldugen fyrir augu &#8211; og \u00feetta er bara \u00ed Evr\u00f3pu og \u00fe\u00fa munt finna einhvern fr\u00e1 Austurl\u00f6ndum.<\/p>\n<p>Sj\u00f3nin hefur \u00fatlit sem getur gert l\u00famskar breytingar \u00e1 sj\u00f3nl\u00edkaninu \u00fe\u00ednu, me\u00f0 \u00fev\u00ed a\u00f0 sveifla a\u00f0alf\u00f3kuspunktinum sem hann lendir r\u00e9tt \u00e1 sj\u00f3nhimnunni. N\u00fdjasti flokkurinn af nau\u00f0synlegum ops\u00ednpr\u00f3teinum \u00fer\u00f3a\u00f0ist l\u00f6ngu \u00e1\u00f0ur en fyrri vins\u00e6li forveri hans fr\u00e1 d\u00fdrum, hefur haldi\u00f0 \u00e1fram a\u00f0 fj\u00f6lbreytast s\u00ed\u00f0an. Hi\u00f0 gagnst\u00e6\u00f0a, sem framleitt er af bakter\u00edum sem h\u00f6f\u00f0u misst \u00feessa ol\u00edudropa \u00e1 \u00fer\u00f3unarferlinu, er a\u00f0 linsan ver\u00f0ur \u00f3n\u00e6m fyrir \u00fatfj\u00f3lubl\u00e1u lj\u00f3si &#8211; \u00feannig a\u00f0 \u00fea\u00f0 \u00fatilokar m\u00f6guleikann \u00e1 a\u00f0 \u00fatfj\u00f3lubl\u00e1tt lj\u00f3s greinist, \u00fear sem \u00fea\u00f0 n\u00e6r ekki einu sinni til sj\u00f3nhimnunnar.<\/p>\n<p>Fyrstu \u201eaugun\u201c, k\u00f6llu\u00f0 sj\u00f3nblettir, voru einf\u00f6ld blettir \u00far lj\u00f3snemapr\u00f3teinum \u00ed einfrumungum hunda. Mismunandi ger\u00f0ir augna, svo sem hryggd\u00fdra og lind\u00fdra, eru af sams\u00ed\u00f0a \u00fer\u00f3un, \u00fer\u00e1tt fyrir fjarl\u00e6ga almenna \u00e6tterni. Gl\u00e6ri\u00f0 er gegns\u00e6tt, litlaus, hlaupkenndur gl\u00e6r sem fyllir sv\u00e6\u00f0i\u00f0 milli augnlinsunnar og sj\u00f3nhimnuf\u00f3\u00f0ringarinnar aftan vi\u00f0 auga\u00f0. N\u00fdja ytra lagi\u00f0 er mj\u00f6g litarefni, heldur \u00e1fram \u00e1 lit\u00feekju sj\u00f3nhimnunnar og myndar n\u00fdjar frumur \u00ed v\u00edkkandi v\u00f6\u00f0vum. \u00dear sem opnun \u00e1 hv\u00f6ssu auga er st\u00e6rri en fersku hli\u00f0arnar \u00e1 efnisauga, \u00fe\u00e1 gerir \u00fea\u00f0 sj\u00f3n minni en ne\u00f0ri hv\u00edtu augun.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/slotegrator.pro\/uploads\/content\/orig\/how-to-start-an-online-casino-in-2023-cover469903567.png\" alt=\"vulkan spiele b\u00f3nus \u00e1 \u00cdslandi\" style=\"padding: 10px;\" align=\"right\" border=\"0\"><\/p>\n<p>Hugurinn sameinar allar uppl\u00fdsingar til a\u00f0 b\u00faa til heildarmynd. H\u00e6gt er a\u00f0 sj\u00e1 hlut me\u00f0 a\u00f0eins fleiri grunni vegna hverrar einustu athygli, \u00feannig a\u00f0 r\u00e1\u00f0leggingarnar sem hugurinn f\u00e6r fr\u00e1 hverju auga eru mismunandi, \u00fe\u00f3 \u00fe\u00e6r skarast. Reyndar mun n\u00fdja sj\u00f3ngleri\u00f0 fr\u00e1 hverju auga skiptast og \u00fe\u00fa getur komist a\u00f0 \u00fev\u00ed a\u00f0 helmingur af n\u00fdju sj\u00f3narhornunum fr\u00e1 hvorri hli\u00f0 \u00e1 hina hli\u00f0ina og alltaf \u00e1 bakhli\u00f0 heilans. Sj\u00f3nglerin tv\u00f6 m\u00e6tast \u00ed sj\u00f3nhimnunni, sem er sv\u00e6\u00f0i sem liggur a\u00f0 aftan vi\u00f0 n\u00fdja sj\u00f3ngleri\u00f0 beint fyrir framan n\u00fdja heiladingulinn og r\u00e9tt fyrir ne\u00f0an efri hluta augans (heilann). \u00dea\u00f0 inniheldur hlaupkenndan v\u00f6kva sem kallast gl\u00e6rul\u00edki.<\/p>\n<p>L\u00edkami Ophiocoma wendtii, tegundar af veikbur\u00f0a stj\u00f6rnu, inniheldur ommatidia, sem sn\u00faa \u00f6llum l\u00edkama s\u00ednum a\u00f0 efnisauga. \u00deessi tegund auga inniheldur klasa af m\u00f6rgum ommatidia \u00e1 hvorri hli\u00f0 h\u00f6fu\u00f0sins, skipulag\u00f0a \u00e1 \u00feann h\u00e1tt sem l\u00edkist raunverulegu efnisauga. A\u00f0rar a\u00f0laganir eru samsett sj\u00f3n, einnig \u00feekkt sem \u201egervihli\u00f0a\u201c, eins og s\u00e9st \u00ed Scutigera. N\u00fdjasta sj\u00f3nin sem myndast er \u00ed raun blanda af beinum augum og samsettu auga. \u00deetta gerist vegna \u00feess a\u00f0 ommatidia sem sj\u00e1 \u201eframan \u00e1\u201c (sameiginlega sj\u00f3n\u00e1sarnir) gleypa n\u00fdja upplifunarlj\u00f3si\u00f0, en f\u00f3lk \u00e1 einni framhli\u00f0 endurspeglar \u00fea\u00f0. N\u00fdja fletjunin gerir kleift a\u00f0 f\u00e1 meiri ommatidia fyrir hv\u00edtt fr\u00e1 sv\u00e6\u00f0i me\u00f0 h\u00e6rri upplausn.<\/p>\n<p>\u00deetta er einfaldlega h\u00e6gt a\u00f0 breg\u00f0ast vi\u00f0 me\u00f0 \u00fev\u00ed a\u00f0 auka st\u00e6r\u00f0 og fj\u00f6lda linsna. Samsett auga getur samansta\u00f0i\u00f0 af fj\u00f6lda einstakra lj\u00f3snema e\u00f0a ommatidia (ommatidium, eintala). B\u00e1\u00f0ar augun \u00ed st\u00f3rum draugafiski safna hv\u00edtu lit fr\u00e1 hvoru \u00f6\u00f0ru meira en og minna en; n\u00fdja hv\u00edta liturinn sem kemur a\u00f0 ofan er einbeittur af linsu, ef \u00fe\u00fa vilt fara \u00ed gegnum minna en, fr\u00e1 bogadregnum spegli sem samanstendur af m\u00f6rgum myndum \u00far hra\u00f0endurskinsdiskum \u00far g\u00faan\u00ednkrist\u00f6llum.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media-173f0.kxcdn.com\/assets\/images\/svg\/brands\/tonybet.svg\" alt=\"vulkan spiele b\u00f3nus \u00e1 \u00cdslandi\" style=\"padding: 20px;\" align=\"left\" border=\"0\"><\/p>\n<p>Athygli hj\u00e1 n\u00e1nast \u00f6llum g\u00e6lud\u00fdrum uppl\u00fdsir \u00feig um \u00fatg\u00e1fu sta\u00f0lanna. N\u00fdi bifh\u00e1rinn er \u00fer\u00edhyrndur \u00ed l\u00e1r\u00e9tta hlutanum sem h\u00e6gt er a\u00f0 m\u00e1la vegna tv\u00ed\u00fe\u00e6ttrar h\u00fa\u00f0unar, n\u00fdrrar bifh\u00e1r\u00feekju. N\u00fdjasti r\u00f6rf\u00f3tur vatns\u00edgula inniheldur lj\u00f3snemapr\u00f3tein, sem \u00e1samt henni gegna hlutverki efnislegs augna; \u00fea\u00f0 kl\u00e1rast ranns\u00f3knarlitarefni, en getur fundi\u00f0 n\u00fdjustu stefnu fr\u00e1 lj\u00f3si me\u00f0 skugga fr\u00e1 \u00f3gegns\u00e6ju kerfi \u00feeirra.<\/p>\n<p>Tap \u00e1 a\u00f0alsj\u00f3n vegna taps \u00e1 n\u00fdjum hv\u00edtn\u00e6mum keilulaga vef \u00e1 makula \u2013 n\u00fdja meginhluta sj\u00f3nhimnunnar. Hins vegar eru \u00feeir sem eru me\u00f0 fj\u00f3rlita erf\u00f0abreyting sem gerir \u00feeim kleift a\u00f0 greina 100 sinnum fleiri liti, eins og fuglar og skri\u00f0d\u00fdr. \u00cd s\u00fdnilegu litr\u00f3fi er tali\u00f0 a\u00f0 flestir geti greint \u00e1 milli 10 millj\u00f3na annarra litbrig\u00f0a me\u00f0 \u00fev\u00ed a\u00f0 nota \u00ferj\u00e1r ger\u00f0ir af keilulaga frumum. \u00deannig er n\u00fdja upplausnin alls sta\u00f0ar l\u00edkari einf\u00f6ldum myndav\u00e9lum.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Greinar Sj\u00f3nr\u00e6nt mun Augnstarfsemi og \u00fe\u00fa munt sj\u00e1 Sj\u00f3n h\u00fa\u00f0v\u00f6rur Leynileg svi\u00f0 athygli mannsins N\u00fdja linsupr\u00f3f\u00edlinn er breyttur til a\u00f0 hafa n\u00e1l\u00e6ga sj\u00f3n (gistingu) sem er h\u00e1\u00f0ur n\u00fdjum bifh\u00e1rv\u00f6\u00f0va. St\u00e6r\u00f0 n\u00fdrra nemandans, sem stj\u00f3rnar lj\u00f3smagni sem fer inn \u00ed augun, er stillt af v\u00edkkunarv\u00f6\u00f0va augans og enda\u00fearmslokav\u00f6\u00f0vanum. Sj\u00f3nin er ekki m\u00f3tu\u00f0 eins og fullkomin sv\u00e6\u00f0i; [&hellip;]<\/p>\n","protected":false},"author":26,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-98781","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/posts\/98781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/comments?post=98781"}],"version-history":[{"count":1,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/posts\/98781\/revisions"}],"predecessor-version":[{"id":98782,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/posts\/98781\/revisions\/98782"}],"wp:attachment":[{"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/media?parent=98781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/categories?post=98781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alqarionline.com\/index.php\/wp-json\/wp\/v2\/tags?post=98781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}