Kugeza ubu, amatara yumuhanda atukura, icyatsi n'umuhondo.Umutuku bisobanura guhagarara, icyatsi bisobanura kugenda, umuhondo bisobanura gutegereza (ni ukuvuga kwitegura).Ariko kera cyane, hari amabara abiri gusa: umutuku n'icyatsi.Mugihe politiki yo kuvugurura umuhanda yarushijeho kuba nziza, irindi bara ryongeyeho nyuma, umuhondo;Hanyuma hongeyeho itara ryumuhanda.Byongeye kandi, kwiyongera kwamabara bifitanye isano rya bugufi nuburyo abantu batekereza ndetse nuburyo bugaragara.
Retina yumuntu irimo ingirabuzimafatizo zifotora hamwe nubwoko butatu bwingirabuzimafatizo.Utugingo ngengabuzima tumeze nk'inkoni twumva cyane urumuri rw'umuhondo, mu gihe ubwoko butatu bw'utugingo ngengabuzima tumeze nk'uturemangingo twumva urumuri rutukura, urumuri rwatsi n'urumuri rw'ubururu.Mubyongeyeho, imiterere yabantu ituma byoroha abantu gutandukanya umutuku nicyatsi.Nubwo umuhondo nubururu bitagoye kubitandukanya, kuko selile ya Photoreceptor selile yijisho ntago yunvikana numucyo wubururu, umutuku nicyatsi byatoranijwe nkibara ryamatara.
Kubijyanye no gushiraho inkomoko yumucyo wumuhanda, hariho nimpamvu ikomeye cyane, ni ukuvuga, ukurikije ihame rya optique yumubiri, itara ritukura rifite uburebure burebure cyane kandi bwohereza cyane, bikurura cyane kuruta ibindi bimenyetso.Kubwibyo, yashyizweho nkibara ryumuhanda ibara ryibinyabiziga.Kubijyanye no gukoresha icyatsi nkibara ryibimenyetso byumuhanda, ni ukubera ko itandukaniro riri hagati yicyatsi numutuku nini kandi byoroshye gutandukanya, kandi ibara rihumye coefficient yaya mabara yombi ni make.
Mubyongeyeho, hari ibindi bintu usibye impamvu zavuzwe haruguru.Kuberako ibara ubwaryo rifite ubusobanuro bwikigereranyo, ibisobanuro bya buri bara bifite ibiyiranga.Kurugero, umutuku uha abantu ishyaka ryinshi cyangwa ibyiyumvo bikomeye, bikurikirwa numuhondo.Bituma abantu bumva bafite amakenga.Kubwibyo, irashobora gushyirwaho nkamabara yumutuku yumuhondo numuhondo ufite ibisobanuro byo kubuza traffic n'akaga.Icyatsi bisobanura kwitonda no gutuza.
Kandi icyatsi gifite ingaruka zigabanya umunaniro w'amaso.Niba usomye ibitabo cyangwa ukina mudasobwa igihe kirekire, amaso yawe byanze bikunze azumva ananiwe cyangwa atitaye cyane.Muri iki gihe, uramutse uhanze amaso ibimera cyangwa ibintu byatsi, amaso yawe azagira ibyiyumvo bitunguranye byo guhumurizwa.Kubwibyo, birakwiye gukoresha icyatsi nkibimenyetso byumuhanda ibara rifite akamaro.
Nkuko byavuzwe haruguru, ibara ryambere ryumuhanda ibara ntirishyirwaho uko bishakiye, kandi hariho impamvu runaka.Kubwibyo, abantu bakoresha umutuku (ugereranya akaga), umuhondo (ugereranya umuburo hakiri kare) nicyatsi (cyerekana umutekano) nkamabara yibimenyetso byumuhanda.Ubu irakomeza kandi gukoresha no kwimuka kuri sisitemu nziza yo gutumiza umuhanda.
Igihe cyo kohereza: Kanama-16-2022
