Umbuzo: Kuyini ukudweba kwe-corneal?
Ngesikhathi sokuhlolwa kwami kwe-lens yonyaka, udokotela wami ukhokhisa imali eyengeziwe yokwakheka kwesimo sezulu. Kuyini ukudweba kwe-corneal?
Impendulo: I- Corneal topography yinkqubo esetshenziselwa ukuqapha nokukala izinguquko ezingase zenzeke ekujuleni nasebuqotho be- cornea iso lakho. Amaphrojekthi e-togragrapher ase-corneal uchungechunge lwezindandatho ezikhanyisiwe, ezibhekwa njenge-placido disc, ebusweni be-cornea, ezibuyiselwa emuva ensimbi.
Ngemva kokuhlaziya izindandatho zokukhanya, ikhompyutha ikhiqiza ibalazwe lokuqondisa kwe-cornea. Izithombe ezikhiqizwa yi-topographer zingasiza udokotela wakho wezilanga lapho ehlaziya impilo yamehlo akho.
Iyini i-cornea?
Izicubu ezibonakalayo, ezibomvu zihlanganisa iris kanye nomfundi. I-cornea inikeza u-2/3 wamandla okuphikisa amehlo. I-cornea iyisici esiyingqayizivele sezakhi ezenziwe ngamaseli akhethekile. Awekho imithwalo yegazi ku-cornea ukuyihlinzeka ukudla. I-cornea ithola ukudla okuningi ngokuqondile ezinyembezini eziphezulu nasemzimbeni we-aqueous (i-fluid egcwalisa ikamelo langaphakathi le-iso) ngaphakathi kweso. Ngenxa yokuthi i-cornea ifana ne-lens, kumele ibe yize futhi imithwalo yegazi ingaphazamisa inqubo yokugxila.
Ukwaziswa kwezinto ezibonakalayo ezibonakalayo?
I-Corneal mappography inikeza ulwazi oluningi mayelana neliso ezindaweni ezihlukahlukene:
- I-Keratometry - Ngaphambi kokusungulwa kwezolimo ze-togragrapher ze- computer, i-keratometer isetshenziselwe ukukala indawo encane e-cornea ephakathi. Inika udokotela izilinganiso ezimbili mayelana nobukhulu be-cornea. I-keratometer ubuchwepheshe obudala kepha usazokuthola okungenani oyedwa kuzo zonke izidokotela. Kodwa-ke, ukuhlaziywa kwe-corneal ukuguqula isimo se-corneal shape. Esikhundleni sokulinganisa amaphuzu amabili, i-corneal topographer ingakwazi ukukala amakhulu ngisho nezinkulungwane zamaphuzu wedatha ukwakha ibalazwe elibala kakhulu lombala we-steepness eye yonke indawo kunoma iyiphi indawo udokotela onentshisekelo kuyo. izindawo ezindaweni ezifundwayo nezintathu eziluhlaza okwesibhakabhaka. Lokhu akubalulekile kuphela esimeni sonke kodwa kuzokutshela udokotela ngokuningiliziwe ukuthi i- astigmatism engakanani onayo.
- Amabalazwe okuphakama - Ama-togragraphic Corneal angabonisa futhi amabalazwe okuphakama. Amabalazwe okuphakama asiza udokotela ukubona amabala angavamile ku-cornea ehlukile ngokujwayelekile kusuka evamile. Isofthiwe ethile ibonisa isithombe esise-3-dimensional ukuthi udokotela angashintsha ukuze aqonde kangcono ukuthi yini engenzeka nge-cornea.
- I-lens yokuxhumana ifanele - Udokotela wakho wezilanga ufuna ama-lensi akho axhumane nawo afanele amehlo akho kanye nokusemandleni akho, futhi ukwazi ukuma ngokuqondile kwe-cornea yakho kubaluleke kakhulu. Ama-lens oxhumana nawo aqinile kakhulu angase abe nomkhawulo ojwayelekile wokugeleza kwezinyembezi , ukudala imvelo engafanele impilo yeseli evamile. Ngakolunye uhlangothi, ukufaka i-lens engavamile kakhulu kungavumela ukunyakaza okungaphezu kwe-lens esweni lakho, kubangele ukungahambi kahle kanye nokulimala kwamangqamuzana e-epithelial.Ukuqhafaza amalensi okudinga kudinga umthwalo wemfanelo omkhulu, wena nodokotela wakho . Kumelwe ube nokuzikhandla ekulandeleni izindlela zokuhlanza ezifanele nokugqoka amashejuli. Udokotela wakho kufanele aqaphele ngokucophelela izinguquko ezincane emehlweni akho ukuze ugweme izinkinga ezingathinta ukuxhumana okungathí sina.
- Ukuhlolwa kwamehlo okumile - Izinyembezi zakho ziyinkimbinkimbi kakhulu. Omunye wemisebenzi yefilimu yezinyembezi ukukhiqiza ubuso obushelelezi obuvela kulo ukukhanya okuyokwenyuka emehlweni. Ngaphandle kwezinyembezi, kunezikhala eziningi ezincane ebusweni be-cornea. Lokhu kudala indawo embi kakhulu. Izinyembezi zigcwalisa zonke izikhala ukuze zenze ubuso obushelelekile. Uma unamehlo owomile, ubuso ngeke bube bushelelezi futhi umbono wakho uzobe uphazamisekile. Kufana nokukhipha ama-lens akho kuzibuko zakho. I-corneal topographer izokwazi ukukhombisa ukuthi isimo siphezulu kangakanani nokuthi iso elomile lingathinta kanjani umbono wakho.
Umthombo:
Elliott, David B. Izinqubo Zomtholampilo Ekunakekelweni Kwamehlo Okuyinhloko, Pp 115-116. Elsevier Limited, 2003.