Kukho ezininzi iingqiqo malunga nombono onja. Enyanisweni, ukubonakala kwezinja kukhululekile kumlinganiselo ofana nomnye umzingeli. Inja inemihlaba ebanzi yokujonga. Umbala ngokwawo awubalulekanga ngokukodwa.
Izinja zibhetele kunabantu ukuba bahlule ngisho nokunyakaza okuncinane kumgama ode. Nangona kunjalo, kwithuba elincinane babona ngakumbi kunathi. Iliso lelija licebile kakhulu kunomntu. Ngokuqhelekileyo, ukuma kwe-lens ishintsho, ukwandisa ubude bomda obalulekileyo, kodwa oku akukwenzeka ngokuphumelelayo njengomntu. Ukuqonda kweso iso lephezulu kunabantu, kodwa kunzima kakhulu ukwahlula phakathi kwezinto ezizimeleyo kunoma yimuphi umgama.
Umbono wePheripheral uhluka kakhulu phakathi kweentlobo. Ngokuqhelekileyo, kuxhomekeka kwindawo yokuhlala kunye nokunqunyulwa kweso ngokwalo.
Zonke iintlobo zegrey
Kuyinto ephosakeleyo ukukholelwa ukuba izinja zinombono omnyama nomhlophe. Ngokubanzi, umbala wembala ukhona kwizinja, kodwa kungekho ngendlela echazwe. Umbono wemibala awubalulekanga kubantu abaxhamlayo, njengezilwanyana, ubomi babo buxhomekeke kumajikijolo enokutya, iziqhamo eziqhakazile, imbewu kunye namantongomane. Iliso lenja linesakhiwo esifanayo, esivakalayo kubo bonke abamele umyalelo wezilwanyana ezinobhubhane. I-retina iqukethe iiseli ezininzi ezibonakalayo - iintonga. Zizo iiseli ezibonakalisa yonke into ebonwe kumthunzi omhlophe nomnyama. Izitshizi ziyavalela ukukhanya, kwinqanaba eliphantsi lokukhanya. Iiseli ezikhethekileyo zembono - imibala - i-retina kwisamba esincinci.
Abafundi benamehlo enja banako ukwandisa kakhulu ukwenzela ukubamba ubuninzi bonke ubuninzi bokukhanya, ukuphucula umgangatho kunye nokusebenza kombono ebusuku.
Izilonda ze-Lacrimal zikhusela i-cornea ekunzeni. Izinja zinekhamera yesithathu, ehlala ivalwe ngaphantsi. Umsebenzi wayo oyintloko kukukhusela nokucoca iso lokungcoliseka kwangaphandle.
Ukukhubazeka kokubonakalayo
Kungekudala okanye kamva, abanikazi baqala ukuqaphela ukuba inja ilahlekelwa. Ukuze ukulahla konke ukungathandabuzeki okanye, ngokuchaseneyo, ukuqinisekisa ubungqina babo, kuyimfuneko ukwazi indlela yokujonga amehlo enja ekhaya. Unako ukuhambisa izinto ezincinci zombala obomvu eduze nenja, umzekelo, bhala ibhola phantsi. Njengezinja zisabela ngokukhawuleza ukuhamba, ukuzola