Kungani amehlo ekati ekhanya?

Izinkulungwane zeminyaka, ukukhanya kwamehlo ekati kuye kwaholela abantu emicabangweni yamandla angaphezu kwawemvelo. Pho kungani amehlo amakati ekhanya? Mhlawumbe ihlaya mayelana nombono we-X-ray wamakati lihlakaniphile, kodwa kunezizathu ezimbalwa zangempela zesayensi zokukhanya kwamehlo ekati.

Kanjani futhi kungani amehlo ekati akhanya

Amehlo amakati ayakhazimula ngoba ukukhanya okushaya i-retina kubonakala kungqimba olukhethekile lolwelwesi lwamehlo. Ibizwa ngokuthi i-tapetum lucidum, okuyiLatini esho “ungqimba olukhazimulayo,” kuchaza i-Cat Health. I-tapetum iwungqimba lwamangqamuzana akhanyayo athwebula ukukhanya futhi akubuyisele ku-retina yekati, okwenza kube nokukhazimula. I-ScienceDirect iphawula ukuthi umbala wokukhanya okunjalo ungaba nemithunzi ehlukene, kuhlanganise nohlaza okwesibhakabhaka, oluhlaza okotshani noma ophuzi. Ngakho-ke, ngezinye izikhathi ungabona ngisho nokuthi amehlo ekati abomvu.

Amakhono Okusinda

Ukukhanya emehlweni amnyama wekati akukona nje ubuhle, bafeza injongo ethile. I-Tapetum ikhulisa amandla okubona ekukhanyeni okuphansi, kuchaza udokotela wezilwane waseMelika. Lokhu, kuhlanganiswe nezinduku ezengeziwe ku-retina, kuvumela izilwane ezifuywayo ukuba zibone izinguquko ezicashile ekukhanyeni nasekunyakazeni, kuzisize zizingele ebumnyameni.

Amakati ayizilwane ezinamaphiko, okusho ukuthi azingela ekukhanyeni okufiphele isikhathi esiningi. Lapha kulapho amehlo akhazimulayo eza kahle khona: asebenza njengamathoshi amancane, esiza amakati ukuthi azulazule emthunzini futhi abone inyamazane nezilwane ezidla ezinye. Ubuhle obuyizimfishane bungase buphathelene nokugona nomnikazi wakhe usuku lonke, kodwa njengezihlobo zakhe ezinkulu zezilwane zasendle, ungumzingeli ozelwe.

Amehlo ekati aqhathaniswa nawabantu

Ngenxa yesakhiwo seso lekati, elihlanganisa i-tapetum, umbono wasebusuku kumakati ungcono kunabantu. Kodwa-ke, abakwazi ukuhlukanisa imigqa ebukhali nama-engeli - babona yonke into efiphele kancane.

Amehlo ekati akhazimulayo akhiqiza kakhulu. Ngokusho kwe-Cummings School of Veterinary Medicine e-Tufts University, "amakati adinga u-1/6 kuphela wezinga lokukhanya futhi asebenzisa ukukhanya okuphindwe kabili okutholakala kubantu."

Enye inzuzo emangalisayo amakati anayo ngaphezu kwabantu ukuthi angasebenzisa imisipha yawo ukulawula inani lokukhanya elingena emehlweni abo. Lapho iris yekati ithola ukukhanya okweqile, iphendula abafundi babe yiziklebhu ukuze bamunce ukukhanya okuncane, kuchaza i-Merck Veterinary Manual. Lokhu kulawula imisipha futhi kubavumela ukuthi bavule abafundi babo uma kudingeka. Lokhu kwandisa inkambu yokubuka futhi kusiza ukuzungeza emkhathini. Ungabona futhi ukuthi abafundi bekati bayanwebeka uma selizohlasela.

Ungesabi futhi ucabange ngokuzayo ukuthi kungani amakati enamehlo akhazimulayo ebusuku - uzama nje ukubheka kangcono umnikazi wakhe othandekayo.