Ukuqonda indlela Ukudluliselwa Kwempahla Kunokukunceda njani Ukuphucula umbono
Unokuva amagama athi "ukufakelwa kweso" esetyenziswe zizigulane, kodwa ukuhlinzwa okwenyathelo lokutshintshwa kweso kwangoko akunakwenzeka. Iliso lonke alikwazi ukuthatyathwa kumntu oyedwa kwaye litshintshelwe kwelinye umntu ukuze kuphuculwe umbono. Oko kusebenza kunye nokufakelwa komzimba kunye nezicubu ezithile, kodwa akunakwenziwa ngeso liso kunye nolwazi lwezokwelapha nolwazi.
Njengamanje, inkqubo yokufakelwa kwamehlo kuphela ekhoyo i- cornea transplant , eyenza i-cornea echaphazelekayo ibe ne-cornea eyenziwa ngumnikeli oshonile. Ukutshintshwa kwe-cornea kunokuvelisa utshintsho oluphawulekayo embonweni. Enyanisweni, abanye abantu banokuba yimpumputhe ngokusemthethweni ngaphambi kokuhlinzwa kwaye bafumana umbono wabo ngowama-20/20 emva kokufakelwa kwe-cornea.
Ngokungafani nokuguquka komzimba, abantu abafumana i-cornea transplant ayifuni imishanguzo yokulwa nokulahlwa ukugcinwa kwe-cornea yokufakelwa.
ICornea
I-cornea yinto ekhethekileyo kunye nebala ebonakalayo phambi kweso elidlala indima ekuncediseni imifanekiso yokujonga iso. Ukukhanya kufuneka kudlule kwi-cornea ukuze ingqondo iqhube umboniso wokubona, ngoko i-cornea icacile xa iphilile. Yenziwe ngamathandathu ahlukeneyo. Iziqendu, ukusuka ngaphandle kwelizwi ngaphakathi, ziyi: epithelium, uluhlu lweB Bowman, i-stoma, uluhlu lweDua, umlenze we-Descemet, u-endothelium.
Ezi zixhobo zisebenza kunye ukuphucula umboniso, kodwa ukuba ziba yimvula okanye i-misshapen, umboniso wehle kakhulu kwaye ungakhokelela ekuziphatheni okuyimpumelelo emva kwexesha.
I-cornea inomgangatho owodwa obalaseleyo: ayinayo igalelo legazi layo. Iisisculi zomzimba zixhaphazwa i-oksijini kunye nesondlo abayidingayo ngenxa yokunikezelwa kwegazi ephoswa yintliziyo.
Iimfuno ze-cornea zidibene nokudibanisa ne-vitreous humor, amanzi aselwandle azalise iso. Oku kungabikho kokunikezelwa kwegazi okuvumela ukuba i-cornea ibe lula ukutsalwa, njengoko kungekho mijelo yegazi encinane ekufuneka ibuyiswe kwakhona kwi-cornea emva kokuba enye i-cornea isuswe kwaye enye ibekwe kwindawo yayo.
Ukunikela ngeCornea
Iindaba ezilungileyo kukuba abantu abaninzi, ukutshintshwa kwe-cornea kunokuthetha ukuphucula okubonakalayo kumbono. Ngokungafani namalungu, apho abaninzi abantu abakwazi ukunikela xa befa, abantu abaninzi banako ukunikela nge-corneas yabo yokufakelwa. Iimeko ezininzi kunye nezifo ezenza kube nzima ukunikela izigqeba okanye ezinye iisculi, ezifana nomhlaza, akuthinteli umnikelo we-corneas.
Ixesha elizayo loTshintsho lweZiso lonke
Inzululwazi kunye nabaphandi bezonyango abazilindele ukuba ukuhlinzwa kwamehlo okutyalwa kwamehlo kube yinto ezayo kusasa. Ukutshintshwa okwenyani kweso kuyakufuna ukuphazamisa nokubuyisela kwakhona i-nertic optic, engaphaya kwamandla okwenziwa ngabagqirha.
Kusenokuba ngamashumi eminyaka okanye nangamawaka eminyaka ngaphambi kokuba iteknoloji yokucubungula yenza into enobunzima kwaye ibandakanyeke ukuhlinzwa, kuze kube yilelo xesha ezinye iintlobo zemiboniso yonyango ziya kusetyenziswa ukuphatha imeko yeziliso.
Imithombo:
Izinto malunga neCornea neCornea Disease. INational Eye Institute. NgoJanuwari 2011. http://www.nei.nih.gov/health/cornealdisease/#4