Ngaba wakha wazibuza ukuba siyibona njani ihlabathi ngokucacileyo kangaka? Isizathu esiphambili soku yi-membrane ecacileyo nebhityileyo ephambi kwamehlo ethu. Le nxalenye, esebenza njengelensi yekhamera, ibizwa ngokuba yi-"Cornea". Ukuba imo yale cornea itshintsha kancinci, oko sikubonayo kunokuba lufiphale kwaye kugqwetheke. Kwiimeko ezinjalo, sikubiza ngokuba yi-'Corneal Topography', uvavanyo olubaluleke kakhulu nolungenabuhlungu lokujonga imo echanekileyo ye-cornea yakho.
Ngamafutshane, yintoni iCorneal Topography?
Eli gama lisenokuvakala lingaqhelekanga. Sidla ngokusebenzisa igama elithi "topography" kwijografi, elithetha ukwenza iimaphu ezibonisa umphezulu womhlaba, imilo yeentaba, iintlambo, imilambo, njl. Ngoko ke uyizoba njani imaphu ngokubonakalayo?
Khawuthelekelele ukuba i-cornea yakho ifana nesiqithi esincinci. Ezinye iindawo zomphezulu wesi siqithi ziphezulu, ezinye iindawo ziphantsi, kwaye ezinye iindawo zinokuba nemingxunya. Kodwa asinakuzibona ezi nguqu ngamehlo ethu. Yiyo loo nto kusetyenziswa indlela ebizwa ngokuba yi-'Corneal Topography'. Into eyenzayo kukuba, isebenzisa isixhobo esikhethekileyo sekhompyutha ukwenza imephu ye-cornea yakho enemilinganiselo emithathu (3D) . Le mephu iboniswa ngombala. Ngaloo mibala, sinokubona ngqo apho i-cornea iphezulu khona, apho ithe tyaba khona, apho incinci khona, kwaye apho ityebile khona.
Ngamafutshane, oku kufana nokufotwa kwefoto ekhethekileyo kwamehlo akho. Akukho ntlungu, kwaye akukho nto ichukumisa amehlo akho.
Kutheni siludinga olu vavanyo?
Olu vavanyo lunemisebenzi emininzi ebaluleke kakhulu kwi-ophthalmology. Kukho izizathu ezintathu eziphambili.
1. Chonga izifo zamehlo uze ubeke iliso kwinkqubela yazo
Ezinye izifo zamehlo zichaphazela ngqo imo kunye nobukhulu be-cornea. Olu vavanyo lubalulekile ekuxilongeni ezo zifo.
- I-Astigmatism: Imeko apho i-cornea ingekho ngqukuva ngokugqibeleleyo, kodwa ide kancinci, njengeqanda. Oku kunokubangela ukubona okufipheleyo.
- I-Keratoconus: Le yimeko embi kakhulu. Okwenzekayo apha kukuba i-cornea iyabhitya kancinci kancinci ize ivuvuke njengekhowuni. Uvavanyo lwe-`Corneal Topography` lubaluleke kakhulu ukuze lubonwe oku kwasekuqaleni.
- Ukonakala kwe-Pellucid marginal degeneration (PMD): Le yimeko apho i-cornea iba buthathaka khona.
- Amanxeba abangelwa kukwenzakala okanye usulelo: Ukuba kukho inxeba kwi-cornea, ungayibona kakuhle indlela elichaphazela ngayo umbono.
- I-Pterygium: Imeko apho ukukhula okunenyama kukhula ukusuka kumhlophe weliso ukuya kwi-cornea.
2. Cwangcisa utyando kwaye ujonge iziphumo
Olu vavanyo lubalulekile xa kutyandwa amehlo, ingakumbi xa kutyandwa i-cornea.
- Utyando lokulungisa umbono nge-laser (i-LASIK okanye i-PRK): Abantu abaninzi bafuna ukususa iiglasi okanye iilensi zoqhagamshelwano ngokwenza utyando lwe-`(LASIK)`. Kodwa ayinguye wonke umntu onokwenza olu tyando. Olu vavanyo ngokuqinisekileyo lwenziwa ukuqinisekisa ukuba i-100% imilo kunye nobukhulu be-cornea yakho zifanelekile kolu tyando. Njengoko bekutshiwo ngaphambili, imeko efana ne-`(Keratoconus)` inokubonwa nokuba ayinazimpawu. Ukuba i-`(LASIK)` yenziwe kubantu abanjalo, iingxaki ezinkulu zinokwenzeka.
- Utyando lwe-cataract: Xa kususwa i-cataract kunye nokufakelwa ilensi yokwenziwa, ulwazi malunga nokuma kwe-cornea lubalulekile ukuze kubalwe ngokuchanekileyo amandla aloo lensi.
- Utyando lokufakelwa i-cornea: Olu vavanyo lunceda ukujonga imeko ye-cornea eyonakeleyo ngaphambi nasemva kokuba itshintshwe ngentsha.
- Ukudibanisa i-corneal cross-linking: Utyando lokuqinisa i-cornea eye yaba buthathaka ngenxa yezifo ezifana ne-`(Keratoconus)`. Olu vavanyo lukwayimfuneko ekucwangciseni olu tyando.
3. Khetha iilensi zokunxibelelana ezifanela kakuhle amehlo akho.
Olu vavanyo alusoloko luyimfuneko ukuze kufakwe ilensi yoqhagamshelwano eqhelekileyo. Nangona kunjalo, ukuba i-cornea yakho inesimo esingaqhelekanga, njengeKeratoconus, iilensi eziqhelekileyo aziyi kusebenza. Kwimeko enjalo, kuya kufuneka usebenzise iilensi zonxibelelwano ezikhethekileyo eziqinileyo (iilensi ze-Rigid gas-permeable - RGP) . Ukuze ilensi enjalo ifanele iliso lakho ngokugqibeleleyo, kufuneka kuthathwe zonke izilinganiso ze-cornea kwaye ilensi yenziwe ukuze ilingane nayo. Imephu efunyenwe kwiCorneal Topography iluncedo kakhulu koku.
Ngubani ofuna ukwenza olu vavanyo?
Usenokuba uzibuza ukuba uyaludinga na olu vavanyo. Oogqirha badla ngokucebisa olu vavanyo kwiimeko ezilandelayo.
| Imeko | Isizathu |
|---|---|
| Ukuba ucinga ngotyando lwelaser (njengeLASIK) | Qinisekisa ukuba i-cornea yakho ifanelekile utyando kwaye akukho zimo zonyango zifihlakeleyo. Eli linyathelo eliyimfuneko. |
| Ukuba udinga utyando lwengxaki ye-cornea | Inceda ugqirha ukuba acwangcise utyando ngokuchanekileyo aze afumane iziphumo ezilungileyo. |
| Ukuba sele utyando lwamehlo | Jonga iziphumo zotyando kunye nendlela imo ye-cornea etshintshe ngayo. |
| Ukuba ufuna iilensi zoqhagamshelwano ezikhethekileyo | Khetha ilensi ekhululekileyo efanela kakuhle i-cornea emile ngendlela engaqhelekanga. |
Uvavanyo lulula kakhulu!
Ngaba kufuneka uzilungiselele ngaphambi kovavanyo?
Ngokwesiqhelo, akukho mfuneko yokulungiselela okukhethekileyo. Nangona kunjalo , ukuba unxiba iilensi zokunxibelelana, ugqirha wakho uya kukuxelela ukuba uyeke ukuzinxiba kwiintsuku ezimbalwa, okanye iiveki, ngaphambi kovavanyo. Oku kungenxa yokuba ukunxiba iilensi kunokutshintsha okwethutyana imo yendalo ye-cornea yakho (i-corneal warpage). Ngoko ke ukuze ufumane imilinganiselo echanekileyo, kufuneka ulinde de i-cornea yakho ibuyele kwimo yayo yendalo.
Kwenzeka ntoni ngexesha lovavanyo?
Le nkqubo yonke ithatha imizuzu embalwa kuphela.
1. Wenzelwe ukuba uhlale esitulweni phambi komatshini ofana nebhola enkulu.
2. Ibunzi lakho nesilevu zibekwe kwiindawo ezimiselweyo kwaye uxelelwa ukuba uhlale ukhululekile.
3. Emva koko bacelwa ukuba bajonge ngqo kwisibane esithile ngaphakathi kwebhola.
4. Ngelixa ulindile, umatshini uthatha imifanekiso emininzi yamehlo akho ngaphandle kwengxolo okanye intlungu.
5. Imifanekiso ethathiweyo ihlalutywa yikhompyutha ize iguqulwe ibe yimephu yemibala ekhankanyiweyo apha ngasentla.
Yiyo leyo! Awuyi kuva nto. Umatshini awuzukuchukumisa namehlo akho . Kufana nokuthatha ifoto.
Iziphumo zovavanyo... iimephu ezinemibala!
Emva kovavanyo, ugqirha wakho uza kukunika iimephu ezinemibala eliqela. Xa uzibona ezi, usenokungakwazi ukuziqonda. Kodwa umbala ngamnye kunye nenani ngalinye linentsingiselo ethile.
Ngokubanzi, imibala efudumeleyo efana nobomvu noorenji ibonisa iindawo eziphezulu/ezivelelayo ze-cornea . Imibala epholileyo efana noluhlaza okwesibhakabhaka noluhlaza ibonisa iindawo ezithe tyaba/ezisezantsi ze-cornea .
Ngokuxhomekeke kulwazi olufunwa ngugqirha, iintlobo ezahlukeneyo zeemaphu zinokufunyanwa.
| Uhlobo lweMephu | Oku kusibonisa ntoni? |
|---|---|
| Imephu ye-Axial (Imephu yeSagittal) | Le yeyona mephu isetyenziswa kakhulu. Ibonisa ukugoba kwe-cornea, oko kukuthi, iindawo eziphakamileyo nezisezantsi (ezifana neenduli neentlambo). Kwi-cornea ephilileyo, le mephu idla ngokuba luhlaza. |
| Imephu yoKuphakama | Oku kuthelekisa i-cornea yakho "nesimo esiqhelekileyo" esenziwe yikhompyutha. Imibala efudumeleyo ibonisa iindawo eziphezulu kunesimo esiqhelekileyo. Imibala ebandayo ibonisa iindawo ezingaphantsi kunesimo esiqhelekileyo. |
| Imephu yoBungqingqwa beCorneal (imephu yePachymetry) | Le mephu ibonisa ubukhulu be-cornea. Imibala efudumeleyo (efana nobomvu) ibonisa iindawo ezincinci, kwaye imibala epholileyo (efana noluhlaza okwesibhakabhaka) ibonisa iindawo ezixineneyo. Le mephu ibalulekile ekuxilongeni iimeko ezifana ne-keratoconus, apho i-cornea iba ncinci khona. |
Musa ukothuka zezi maphu zinemibala. Luxanduva lukagqirha wakho ukuhlalutya ngokuchanekileyo ulwazi olukwezi maphu aze anike ingcaciso ngemeko yakho. Mbuze nayiphi na imibuzo onokuba nayo.
Ingaba oku kukhuselekile? Ndingathetha nini nogqirha?
Ewe. I-Corneal Topography luvavanyo olukhuselekileyo oluyi-100%. Akukho zingozi okanye iziphumo ebezingalindelekanga ezaziwayo. Luvavanyo olungenabuhlungu nolukhawulezayo.
Ukuba unemibuzo malunga neziphumo zovavanyo lwakho, okanye ukuba iimpawu zamehlo akho (ezifana nokungaboni kakuhle, iintlungu) zintsha okanye ziyanda, bona ugqirha wakho ngoko nangoko.
Umyalezo Wokuya Ekhaya
- I-Corneal Topography luvavanyo olungenabuhlungu nolukhuselekileyo oludala imephu ye-3D ye-cornea (inxalenye ecacileyo engaphambili kweliso lakho).
- Oku kubalulekile ekuxilongeni izifo ezifana ne-'Keratoconus' kunye ne-'Astigmatism', kunye nokufumanisa ukuba ufanelekile na utyando lwe-laser olufana ne-'LASIK'.
- Oku kunceda ekudaleni iilensi zoqhagamshelwano ezikhethekileyo zee-cornea ezimile ngendlela engaqhelekanga.
- Iziphumo zovavanyo ziboniswa ngendlela yeemephu zemibala. Ugqirha wakho uza kukuchazela intsingiselo yezi zinto ngokulula.
- Ukuba unemibuzo malunga nolu vavanyo okanye iziphumo, ungoyiki ukubuza ugqirha wakho.
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