Fensetere ho lefatše. The mele oa motho o

Tsebo ea ho se tšoane ha lefatše kenya letsoho hore ho le hlaphohetsoe likelellong ka. Mahlo a re fa ba etsang liphesente tse mashome a robong ba boitsebiso bohle o tlang. Litopo tsa Motho a ke a haufi-ufi amanang ho boko, tse tšepetsoe ho Morero o ka sehloohong oa tsamaiso ea methapo ho buisana le linaha tse ling. Boitsebiso bakeng sa khanya-nahanela lera la leihlo ke boko neural dinama tse nyenyane tse. Litopo tsa monna a sebelisa e le karolo pheriferale tsa semanolli setšoantšo - photoreceptors. E le mokhanni bonwang semanolli sebedisa ea methapo ea kutlo optic. Sena mochine o rarahaneng oa sebetsa ka karolo e bohareng, e leng e tsepame sebakeng bonwang ka lobe occipital ya cortex bokong.

Ha a bua ka makala a pono, re ne re atisa emela lik'hemik'hale tseo tse ntle. Pele ho tsohle, e para ya thaka tsa (mahlo a) le 'mele ho phetha mesebetsi ea thusang. Tsena li akarelletsa ho dintshi, lintši, eyelashes, lacrimal tšoelesa le mesifa ocular. The lids ke letlalo lemenong, ba fokotsa leihlo le slit e koaloa haeba ho hlokahala. Holim'a le ka hare la lekholong la ke mucous lera hore ophthalmologists litsebi bitsoa conjunctiva. Mosebetsi o ka sehloohong oa lilemo tsa bo ke setlolo sa mokelikeli leihlo la eohle, hammoho le ho sireletsa holim tloha omisa le litšusumetso phetha molao feela. Ka tloaelo motho a etsa roba hang ka metsotsoana e mehlano.

Boikakaso ba botle efe kapa efe - Eyelashes - ba teng ka metshetshe tsa dintshi, ba ile ba ba a lokisetsa ka mela 2-3, palo ea bona e fihla mashome a robeli. Ba phetha mosebetsi e sireletsang, lemosa khahlanong le ho ikopanya le leihlo mucosa likaroloana tsoang linaheng tse ling. A karolo ea e khōlōhali e etsa bonnete ba tshebetsong tloaelehileng ea leihlo phetha tšoelesa lacrimal. Ho e teng ka ntle ka hukung e ka holimo ea leihlo. O lula a le sa khaotse a etsa chelete e khethehileng lekunutu - slozu. Letsatsi le letsatsi ba modumo fihla 100 di ml. Tabola ka nasolacrimal difapho tswelela pele ho re thefula habohloko ka nasal cavity. Lik'hemik'hale eohle e emela ka liphesente tse 1,5 tharollo tshwana letsoai (NaCl), e akarelletsang moemeli germicidal (lysozyme). Tabola mesebetsi a 'maloa. Ke hlatsoa holim 'a leihlo la ka, hydration tsa lona le sireletsoe ho likaroloana tsoang linaheng tse ling' me libaktheria li eketsa O mosebetsi ntho sehlahisoa tšohile tsitsipano le ho imeloa kelellong le maikutlong.

Litho tsa botho tse ka tshisinyo kamehla. Bakeng sa ho fallela ka thaka tsa kopana le mesifa ea leihlo. Ka li bokeletseng tsa mahlo a motho, ho na le mela e mene le para ea mesifa oblique. tlhomamiso bona etsa bonnete ba tshebetso synchronous tsa lilepe le ditshwantsho tse mong le e mong leihlo, e le hore ba converge ka Sepheo, e leng ho nkoa.

The leihlo ke likoluoa tsa tlhaho chitja lense bao bophara fihla tse peli le halofo emetse disentimitara. Ba hae ba bararo-fokotsa lera. Bitsoa fibrous ntle (tunica), karolelano ba ile ba fumana lebitso vascular le lebitso la ka hare tsa photosensitive (ho retina).

The mele oa motho o na le rarahaneng tsa tlhaho mochine, e leng bakeng sa tshebetso e tloaelehileng hloka kalafo hloko. Feela joalokaha makala a ho potoloha ha mali a batho, mahlo a ba etsa mosebetsi oa bona le phapang le 'ngoe feela eo ba e nka e le ba bang kaofela hanyane ka robala batho, empa tshebetso bona e sa fediswa, empa feela e ba ho feta "eco mokgwa wa".

Bakeng sa tshebetso e tlwaelehileng, leihlo tlameha ho tieo ho ikamahanya le bohloeki ba mosebetsi bonwang. Tsena li akarelletsa ho arohana ea ho sebetsa nako e ho laela le linako khutšoanyane ditshitiso. E rarahaneng ea lintlheng tsa boitlhakiso hore lumella eseng feela hore le koetlisa le molumo mesifa ea leihlo, empa hape le ho tsitsisa lense mosebetsi le bakeng sa dithulaganyo le methapo ea kutlo.

Ho hlokomela ea pono ea bona e tla etsa bonnete ba hore o na le nako e telele tla kgona ho thabela ka botlalo ya mefuta e fapaneng ya mebala ea lefatše le re potolohileng.