Ibali Elimangalisayo Lamehlo Ethu: Masifunde ngeli lungu lixabisekileyo ngendlela elula!

Ngaba wakha wazibuza ukuba amehlo ethu amangalisa kangakanani, asebenza njani njengee-supercomputer? Nje ukuba sijonge into ethile, la mehlo mancinci anokuxelela ingqondo yethu ngemizuzwana embalwa ukuba inombala onjani, imilo yayo, nokuba inkulu okanye incinci, ukuba ikude kangakanani, nokuba ikwindawo enye okanye iza kuthi, kwaye iza ngokukhawuleza kangakanani. Iyamangalisa ngokwenene, akunjalo? Ngoko ke namhlanje, masithethe ngala mehlo axabisekileyo.

Amehlo akhuselwe njani? Kuyamangalisa!

Amehlo ethu angamalungu abuthathaka kakhulu, yiyo loo nto imizimba yethu iye yavelisa iindlela ezimangalisayo zokuwakhusela.

Umngxuma okhuselekileyo ngaphakathi kwentloko: isokisi (i-orbit)

Ubusazi na ukuba iibhola zethu zamehlo zifana neebhola zeping-pong? Zifumaneka ngaphakathi kwekhakayi, kwindawo encinci ejikelezwe ngamathambo. Oku sikubiza ngokuba yi-orbit . Njengelitye elinqabileyo, olu lwakhiwo lwamathambo lukhusela iliso kwiimpembelelo zangaphandle.

Iinkophe kunye namashiya: asizozinto ezintle nje kuphela!

Inxalenye yeliso esiyibonayo ngaphandle ikhuselwe ziinkophe kunye neenkophe. Ezi ayizozinto zintle nje kuphela, zilungile. Zombini ezi zinto zinceda kakhulu ekuthinteleni uthuli kunye nokungcola ukuba kungangeni elisweni nasekukhuseleni iliso ekukhanyeni okuqaqambileyo. Khawuthelekelele, ukuba singazivumelanga ngengozi ukuba kubekho uthuli olungena elisweni lethu, zingavaleka ngokukhawuleza kangakanani iinkophe! Kufana nenkqubo yokhuseleko oluzenzekelayo .

Iinyembezi: Umlingo ohlambulula amehlo

Enye into emangalisayo ekhusela amehlo ziinyembezi. Iinyembezi aziphumi nje xa siziva sidakumbile. Enyanisweni, iinyembezi zigcina amehlo ethu emanzi, kwaye zihlambulula nothuli kunye nokungcola okusenokuba kungene emehlweni ethu ngeenkophe kunye neenkophe zethu. Akupheleli apho, iinyembezi zinokukhusela amehlo kwiintsholongwane .

Ubusazi? Xa siqhwanyaza amehlo, amehlo ethu asasaza umaleko omncinci weenyembezi, ukukhutshwa kweoli, kunye nencindi phezu komphezulu wamehlo ethu. Yiyo le nto igcina amehlo ethu emanzi kwaye iwathintele ukuba ome.

Uyazi ukuba ezi nyembezi ziveliswa phi? Phezulu, ikona engaphandle yeliso ngalinye, kukho amadlala amancinci abizwa ngokuba yi-lacrimal glands . Kulapho ziveliswa khona iinyembezi. Emva kokufumisa nokucoca iliso, ezi nyembezi zihamba ngenkqubo encinci yemibhobho engaphakathi kweliso zize ziqokelele kwingxowa encinci ebizwa ngokuba yi-lacrimal sac, efumaneka phakathi kweliso nempumlo. Ukusuka apho, iinyembezi ziphuma ziye kwityhubhu edibanisa nempumlo. Yiyo loo nto xa sikhala, sifumana impumlo egobhozayo!

Ngubani ohambisa amehlo akhe ngasemva nangaphambili?

Ukuze sijonge into ethile, sijika amehlo ethu aye kwelo cala. Oku kwenziwa zizihlunu ezintandathu ezincinci ezijikeleze iliso. Ezi zibizwa ngokuba zizihlunu ezingaphandle kweso.Ezi zihlunu zisebenza njengeentambo ezisetyenziselwa ukwenza umdaniso woonopopi. Ezi zihlunu zintandathu zitsala kwicala elinye zize zijike iliso kuzo zonke iindlela, phezulu, ezantsi, ekhohlo, nasekunene. Ngokwesiqhelo, ezi zihlunu emehlweni omabini zisebenza kunye, ngaxeshanye, nangendlela efanayo. Emva koko omabini amehlo agxile kwindawo enye, kwaye sibona ngokucacileyo. Oku kubizwa ngokuba yi-binocular vision . Yiyo loo nto sinokuqonda ngokuchanekileyo umgama wento.

Sibona njani ngokwenene? ​​Ihlabathi elimangalisayo elingaphakathi kweliso!

Kulungile, ngoku makhe sijonge oko kungaphakathi kweliso nendlela esizibona ngayo izinto. Udonga lweliso lwenziwe ngamaleya amathathu, njengetswele.

1. I-Sclera: Inxalenye emhlophe yeliso eliyikhuselayo.

Olu lolona ngqimba luqinileyo, olungaphandle kakhulu lweliso. Xa ujonga esipilini, umhlophe weliso yi -sclera . Yenziwe ziithishu eziqinileyo kakhulu ezine-fibrous. Yile nto enika iliso imo yalo kwaye ikhusela iindawo ezibuthathaka ngaphakathi.

Ngaphambili kweliso, le sclera iqhagamshelwe kwindawo ecacileyo necacileyo ebizwa ngokuba yi cornea . Ifana nefestile. Ukukhanya kungena kweliso ngale cornea.

Ngaphezulu kwe-sclera, kukho enye inwebu ebhityileyo necacileyo ekhusela iliso ekubeni lome. Ibizwa ngokuba yi-conjunctiva . Ngamanye amaxesha xa amehlo eba bomvu, yi-conjunctiva esulelekayo.

2. I-Choroid: Umaleko ophakathi owondla iliso.

Olu lulwelo lwesibini, okanye oluphakathi, lodonga lwebhola yeliso. Ngaphakathi kwi-choroid kukho imithambo yegazi emininzi ethwala ioksijini kunye nezondlo eziya elisweni. Njengokuba umthi udinga amanzi kunye nesichumiso, iliso nalo lidinga esi sondlo ukuze lisebenze kakuhle.

3. I-Retina: Isikrini esibonakalayo esibamba ukukhanya

Olu lolona luhlu lwesithathu, olungaphakathi lweliso. I-retina lulwahlulo oluthambileyo nolunovakalelo kakhulu lokukhanya lwezicubu zenkqubo yemithambo-luvo. Lufana nefilimu ekwikhamera endala. Ukukhanya okuvela kwizinto esizibonayo kuvela nge-cornea, kujoliswe yilensi, kuze kuwele kwi-retina.

I-retina ineentlobo ezimbini ezikhethekileyo zeeseli ezinokubona ukukhanya: ii-cone cells kunye nee-rod cells . Ii-cone zezona zisivumela ukuba sibone umbala size sibone ngokucacileyo. Ii-Rod cells zisinceda sibone ekukhanyeni okuphantsi.

Xa ukukhanya kubetha kwi-retina, kuguqulwa kube ziimpawu zombane. Ezi zimpawu emva koko zihamba ngemithambo-luvo efana nentambo ebizwa ngokuba yi-optic nerve ukuya ebuchotsheni. Ingqondo ihlalutya ezi zimpawu ize izitolike njengemifanekiso yethu. Ayimangalisi na le nto?

Ijeli engaphakathi kweliso: I-Vitreous Humor

Indawo engenanto embindini weliso izaliswe yinto ecacileyo efana nejeli ebizwa ngokuba yi- vitreous humor . Le jeli ivumela ukukhanya ukuba kudlule ngaphandle kokuphazanyiswa kwi-retina. Ikwanceda iliso ukuba ligcine imo yalo engqukuva.

Izinto ezilula ekufuneka uzikhumbule (Umyalezo Wokuya Ekhaya)

Ngoko ke, ngoku uyaqonda indlela amehlo ethu antsonkothileyo kwaye asebenza ngayo ngendlela emangalisayo.

• Amehlo axabiseke kakhulu: Sifanele siwanyamekele kakuhle la mehlo mabini asinceda sibone ihlabathi lethu.
• Ukhuseleko lubalulekile: Lumka kwizinto ezingonakalisa amehlo akho (ilanga, uthuli, izibane ezikhanyayo). Nxiba iiglasi zokhuseleko xa kuyimfuneko.
• Gcina ucocekile: Kuphephe ukuchukumisa amehlo akho ngaphandle kokuhlamba izandla zakho rhoqo. Oku kunokunciphisa umngcipheko wosulelo.
• Ukuphumla okufanelekileyo: Ungalibali ukunika amehlo akho ikhefu xa uchitha ixesha elininzi ujonge ikhompyutha okanye ifowuni.
• Ingcebiso kagqirha: Ukuba ufumana naluphi na uvakalelo olungathandekiyo emehlweni okanye utshintsho kwindlela obona ngayo, qiniseka ukuba ubona ugqirha wamehlo.

Amehlo ethu sesinye sezipho ezixabisekileyo esakha sazifumana. Ngoko ke, luxanduva lwethu ukuwanyamekela. Xa ucinga ngomsebenzi omangalisayo owenziwa zezi zitho zincinci, uya kuqonda ukuba sinombulelo kangakanani ngawo!

Amehlo, umbono, ulwakhiwo lwamehlo, i-sclera, i-cornea, i-retina, iinyembezi