Kungani sigwinya amehlo ethu?
Njengabantwana, iningi lethu lalinemibhikisho ebhekene nezinkanyezi nabangani. Kuze kube nini ungabamba ukuthi ubheke ngaphandle kokuthi uphenduke? Amehlo akho aqala ukushisa futhi amanzi futhi ekugcineni wayeka.
Ukuchofoza isenzo esisheshayo sokuvala nokuvula ijwabu leso. Ukuphuza kuyadingeka ngoba kukhishwa izinhlayiya zikothuli futhi kugcoba i-eyeball.
I-blink yesilinganiso ithatha cishe ama-millisecond ayi-400, kodwa ijubane lingathinteka yizinto eziningi ezinjengokukhathala, ukusetshenziswa kwemithi kanye nezimo ezithile zempilo. Ngisho noma mhlawumbe awuboni, umuntu ojwayelekile uyabuya cishe njalo ngemva kwemizuzwana engu-10. Ubuchopho bomuntu buyakwazi ukungazinaki ubumnyama bokukhanya, okusivumela ukuba sibe nombono oqhubekayo wezwe.
Njengoba kushiwo ngenhla, isizathu esiyinhloko samehlo ethu agxuma ukusula futhi ukuvuselela ifilimu lethu lezinyembezi. Ifilimu lethu lezinyembezi empeleni liyinkimbinkimbi futhi lenziwe okungaphezu kwamanzi. Izinyembezi zethu zenziwa ikakhulukazi ngamanzi, amafutha kanye ne-mucus. Futhi, kunezinkulungwane zezinye izingxenye ezifana nama-lysosomes asebenza njengama-antibiotic yemvelo. Kukhona nezakhi eziningi nezamino acid ezisiza ukondla amangqamuzana e-cornea, esicacile, nesakhiwo esifana nesimo se-front of the eye.
Ngaphandle kokugcina amehlo ethu agcwele, ifilimu yethu yezinyembezi nayo ibuye:
- kusiza ukwakha ubuso obuseduze, obubushelelezi bokukhanya okuphezulu phezu kwe-cornea ukuze ukukhanya kugxile kahle
- kusiza ukudlulisa oksijeni kusuka emkhathini kuya e- cornea , ngoba ayikho imithwalo yegazi yokuyihambisa ngokuqondile
- kuvimbela ukutheleleka ngenxa yobukhona be-lysozyme namanye ama-enzyme e-antibacterial
- ugeza ama-debris
- inikeza indlela yamaseli amhlophe egazi lapho kunomonakalo ebusweni
Kunezinhlayiya eziningi zezinhlobo ezahlukene kujwabu leso. Uma iso likhanya, kunomshini wokucindezela oveza lezi zinhlayiya ukufihla izingxenye zezinyembezi. Kukhona nokunyakaza okuncane okuhambisana nendawo yejwabu leso eliqhubezela i - puncta , ifilimu yokukhipha ifilimu.
Ngakho, ukugcoba kubonakala sengathi yisona sizathu esiyinhloko esisiqhakazile. Kodwa-ke, ososayensi baye bathola ezinye izizathu zokuthi kungani singase sizizwe njengezinye izikhathi. Usosayensi usho ukuthi sikhanyisa ngaphezu kwalokho okudingekayo ukuze kuvuselelwe ifilimu yezinyembezi. Ucwaningo oluphethwe usosayensi ngo-2012 lusikisela ukuthi singase sicabange ngezinye izizathu.
Ngemva kokubukeza ucwaningo oluningi, abacwaningi bathola ukuthi izikhathi eziqondile lapho siziqhakaziza empeleni asikho okungahleliwe. Empeleni bathola ukuthi siyaziqhenya ngezikhathi ezibikezelayo. Isibonelo, uma ufunda, iningi labantu liye lahluma ekupheleni komusho. Uma umuntu elalela inkulumo, bathambekele ekukhanyeni lapho isikhulumi siyeka phakathi kwezitatimende. Esinye isibonelo lapho abantu bebukela ividiyo, bonke bavame ukukhanya uma isenzo sevidiyo sidlala isikhashana.
Kuthola kancane kunzima, kodwa ososayensi babe nomuzwa wokuthi sisebenzisa ama-blinks njengendlela yokuphumula kwengqondo emfushane esheshayo ukuvala ukubonakala okubonakalayo ukuze sikwazi ukugxila kulokho okuseduze.
Usosayensi wathola ukuthi lapho abantu beqhakazile, umsebenzi wezingqondo wenziwa ezindaweni ezithile ebuchosheni obusebenzayo lapho ingqondo isesimweni sokuphumula okuphuthumayo. Babenomuzwa wokuthi ukusetshenziselwa kwalesi sigaba sobuchopho kubhekana nokuhlukana kwengqondo okwesikhashana okwavumela ukuba kunakekelwa kangcono lapho amehlo evula futhi.
Abanye baye baphawula ukuthi siyabhaqa ngenxa yezizathu ezithile ezingokwengqondo. Ucwaningo olwengeziwe luyadingeka kodwa kubonakala sengathi isimo sethu sengqondo siyashintshwa uma sixuba hhayi nje ukuvuselela ifilimu lethu lezinyembezi.
Umthombo: Tamaimi Nakano, ukuvuselelwa okwesikhashana okuhlobene ne-Blink yenethiwekhi yemodi yokuzenzakalelayo ngenkathi kubuka amavidiyo, i-PNAS, 702-706, itha: 10.1073 / .1214804110, Disemba 2012