Isakhiwo Iso lomuntu

Njengoba lesi saga owaziwa isiRashiya, "amehlo -. Nesibuko komphefumulo" On kubo ungafunda uhlamvu komuntu. Through emehlweni abantu babone izwe, bheka into enhle ukuthi kwenzekani eceleni.

Kanye ngaphakathi lo umzimba emangalisayo? Kuyini isakhiwo iso?

I Ingcenye ephakathi yesigaba iso iyi inhlamvu yeso. Ixhumeke nge ubuchopho ikakhulukazi emsipheni optic. I inhlamvu yeso lesi sijame njengebhoksi okweqanda. Siqukethe front futhi bakhulise izigxobo zazo zixhunywe umugqa oqondile - eksisi optical. Ubude eksisi optical e Umuntu ophilile udinga 24 mm. Eye yenkabazwe uhlukanisa inhlamvu yeso zibe izingxenye ezimbili, kancane emifushane kuka eksisi optical. Ubude bayo 23.6 mm. Kuqondile inhlamvu yeso ubukhulu kuyinto 23.3 mm. I inhlamvu yeso has ulwelwesi ezintathu ukuvikela ikhenela emathonyeni amabi kusukela ngaphandle. Lona yangaphandle igobolondo lunemicu le choroid maphakathi kanye retina kwangaphakathi. capsule corneal-scleral has a umsebenzi zokuzivikela: ayikuvumeli imizimba angaphandle ukungena kuyi-lens futhi umzimba Vitreous. ukujiya corneal ezindaweni ezahlukene kuhluka 0.6 mm kuya ku-1 mm. Ngo ukusebenza kwabo optical kuba refracting eziqine. isakhiwo Eye ifakwe ukuze cornea ayiqukethe imithambo yegazi. Kodwa-ke wabeka inqwaba kwalapho kuhlangana khona imizwa. Kuyinto ngenxa hypersensitivity we sclera umuntu ° ng kanye squints at ingozi kancane iso. I sclera esweni kusukela ngaphandle ukujiya engafinyelela kwengu-1 mm., Nakuba ohlangothini bangaphakathi mncane kakhulu. sine yayo isiyingi ulawula outflow uketshezi intraocular.

Isakhiwo iso ifakwe ukuze ingcindezi evamile iso inakekelwa ngaso sonke isikhathi. Isikhala ngemva ekamelweni cornea egcwele umswakama, by ngezithako zawo kwamakhemikhali, elifana nalelo ka cerebrospinal fluid. the anterior ekamelweni elingemuva odongeni ukhonza njengomdala iris, futhi agcinwe lapho umfundi. Iris iqukethe zombala obhekene umbala amehlo. A uphawu wamehlo is zofuzo ngobulili, nasemishadweni amnyama iso umbala buyimfanelo evelele maqondana ukukhanya. Ngaphezu kwakho konke, i-uphawu evelele kuyinto ukutholakala lo mbala, kuyilapho amehlo grey noma ukukhanya brown kungenzeka ngesikhathi okuqukethwe ongaphakeme sombala. Uma lo mbala Umbala nhlobo, umuntu i-albino. imithambo yegazi ukunikeza Pinkish iso elimhlophe. Iris has imisipha ezimbili banesibopho ubukhulu umfundi. Ngo ukukhanya okukhulu Umfundi kuyehla futhi kuba ebumnyameni, kunalokho, ke liya livuleka njengoba zikhula. Umzimba ciliary unesibopho ukukhiqizwa koketshezi intraocular.

Isakhiwo iso ngokuphelele ngokuya physics optical. Kuyamangalisa ukuthi imvelo idale indlela abathola, ikhophi lwesintu akukakabi ngaphansi amandla. I-retina inezendlalelo eziyishumi. Kuyinto unesibopho kumiswa isithombe bese bezibona imibala kanye shades. On-retina indlela enempilo, kuye ngenani akachazeki shades indoda. Futhi Rod- ka Isigaxa receptor libe izingxenye ezine: ingxenye olungaphandle, constriction, ingxenye engaphakathi kanye izinhlaka zokuxhumana zobuchopho ensimini. Izinduku nozwela ukukhanya kukhona, sibonga rhodopsin sombala and Isigaxa nge iodopsin kangcono bamba ezinyakazayo. Kuyaphawuleka ukuthi eziningi isilwane emhlabeni isakhiwo iso evumela kuphela khona izinti, kodwa akukho Izigaxa.

Ukuze ukufunda uhlobo biophysical isakhiwo kanye umsebenzi amehlo kumele ifundwe ngokuhlanganyela isakhiwo ezinzwa eziyimpumelelo adlulisa ulwazi kusuka retina Lobe occipital zobuchopho. Kusukela endaweni emaphakathi esweni disc emsipheni out Vienna kanye Umthambo. Kumiswa isithombe wadluliselwa iso esesisele engxenyeni kwesokudla ubuchopho, futhi umfanekiso, fixed nasesweni lakhe lokunene - ngakwesobunxele.

Lesi sihloko sichaza isakhiwo iso, iqukethe amaqiniso ezijwayelekile kuphela. Uma ufuna ukuqonda isakhiwo eningiliziwe izinhlaka umbono nezinhloso nemigomo yeNhlangano nokusebenza kwabo, kufanele ufunde lwemibhalo eminingi zamehlo izincwadi.