Ingabe ngezinye izikhathi uzizwa sengathi umhlaba awucacile? Uma ushayela ebusuku, ingabe izibani zezimoto eziphambi kwakho zibonakala zingacacile? Noma uzizwa sengathi awukwazi ukubona kahle ngisho nalapho usebenzisa izibuko zakho? Esinye sezizathu eziyinhloko zalokhu kungaba umehluko omncane esimweni samehlo akho. Namuhla, sizokhuluma ngokuhlolwa okulula, okungenabuhlungu okungakusiza ukuthola.
Kuyini i-Keratometry?
Igama lingase lizwakale liyinkimbinkimbi kancane, kodwa empeleni lilula kakhulu. Kalula nje, i-keratometry iyisivivinyo esilinganisa ukugoba, noma ukuma, kwe-cornea emehlweni akho.
Manje ungase uzibuze ukuthi iyini i-cornea. Cabanga ngeso lethu njengekhamera enhle. Ungqimba olucacile noluncane phambi kwale khamera yilokho esikubiza ngokuthi i-cornea. Kufana nengilazi evikelayo phezu kwelensi yekhamera efonini yakho. Ukukhanya kungena esweni lethu ngale cornea. Ngakho-ke, kubaluleke kakhulu ukuthi isimo sale cornea sibe silungile ukuze sibe nombono ocacile. Ukuhlolwa kwe-keratometry kulinganisa leso simo.
Kungani lolu vivinyo lubalulekile? Luzokutholani?
Isimo esiyinhloko nesivame kakhulu esitholwa yilolu vivinyo yi- astigmatism . Lesi yisimo esivame kakhulu esibangela ukubona okufiphele.
Ake sikuqonde lokhu kalula.
Ngokuvamile, i-cornea yeso eliphilile imile kahle, njengebhola lezinyawo, ukuze ukukhanya okungena esweni kugxile endaweni eyodwa, okusivumela ukuthi sibone isithombe esicacile.
Kodwa ukuma kwe-cornea yomuntu one-astigmatism akuyona indilinga ephelele. Kungase kube kunde kancane, njengebhola le-rugby. Noma kungase kugobe ohlangothini olulodwa, njengengemuva lesipuni. Uma lokhu kwenzeka, ukukhanya okungena esweni akugxili endaweni eyodwa, kodwa ezindaweni eziningana. Yingakho umbono ufiphele futhi izithombe zibonakala zinwetshiwe.
Ngakho-ke, inhloso eyinhloko yokuhlolwa kwe-keratometry ukuthola ukuthi une-astigmatism yini, futhi uma kunjalo, ngezinga elingakanani.
Lokhu kuhlolwa kubalulekile nakwezinye izimo eziningana:
- Ngaphambi kokugqoka amalensi okuxhumana: Ukuze ukhethe ilensi yokuxhumana efanelana kahle neso lakho, udinga ukwazi izilinganiso eziqondile ze-cornea yakho.
- Ngaphambi kokuhlinzwa kwe-cataract: Phakathi nalokhu kuhlinzwa, kufakwa ilensi yokwenziwa (i-IOL) esweni. Lezi zilinganiso ze-keratometry zibalulekile ukukhetha ilensi efanelana kahle neso lakho.
Lolu vivinyo lwe-Keratometry lwenziwa kanjani?
Lokhu ukuhlolwa okusheshayo kakhulu futhi okungenabuhlungu. Kungenziwa ngesikhathi sokuhlolwa kwamehlo okuvamile. Akudingeki ubeke eceleni usuku oluhlukile lwalokho.
Kusetshenziswa idivayisi ebizwa ngokuthi 'iKeratometer' kulokhu. Uma uyibuka okokuqala, ibukeka njengeteleskopu encane. Kodwa-ke, ayibheki izinkanyezi ezikude, kodwa ibheka amehlo akho eduze kakhulu. Ake sibheke kancane kancane ukuthi ukuhlolwa kwenziwa kanjani.
| Izinyathelo | Kwenzekani? |
|---|---|
| 1. Ukuzilungiselela | Uzocelwa ukuthi uhlale esihlalweni, ubeke isilevu sakho endaweni ekhethekile emshinini, bese ubeka ibunzi lakho ebhareni elikhethekile. Lokhu kwenzelwa ukugcina ikhanda lakho lisendaweni eyodwa ngesikhathi sokuhlolwa. Udokotela uzobe eselungisa umshini ukuze iso lakho libe sesimweni esifanele. |
| 2. Ukubuka ngedivayisi | Uzocelwa ukuthi ubheke ngembobo encane emshinini (i-eyepiece). Kufana nokubheka nge-binoculars. Ungase ufune nokuvala elinye iso elingahlolwa okwamanje. |
| 3. Ukubuka isithombe esingaphakathi | Ngaphakathi komshini, uzobona isithombe esifana nezindilinga ezintathu, noma isithombe esinezimpawu ezinhle (+) nezimbi (-). Uyalulekwa ukuthi usibheke ngaphandle kokucwayiza. |
| 4. Ukulinganisa okuqoshiwe | Njengoba ubheka leso sithombe, udokotela uphendula izinkinobho zomshini ukuze adale lezo zithombe. Ngesinye isikhathi, lezo zimpawu ezimbili ze-plus (+) ziyathintana. Ngaleso sikhathi, uqopha izilinganiso. |
| 5. Ukuhlola elinye iso | Uma iso elilodwa seliqediwe, elinye iso liyahlolwa ngendlela efanayo. Ukuhlolwa konke kuthatha isikhathi esifushane kakhulu, cishe imizuzu embalwa. |
Ingabe kukhona izingozi noma izinkinga kulolu vivinyo?
Lutho neze. Lokhu ukuhlolwa okuphephile okungu-100% . Akukubangeli ingozi noma ubuhlungu . Nakuba ukukhanya okuvela emshinini kukhanya kancane, ngeke kulimaze amehlo akho noma umbono wakho.
Kodwa kukhona into eyodwa encane. Esikhundleni sokubiza lokhu ngokuthi "ububi," cabanga ngakho njengokwazi uhlobo lwalolu vivinyo. Ukuhlolwa kwe-keratometry akusikho ukulinganisa okunembile okungu-100% kwe-cornea yakho, kodwa kunalokho kuwukulinganisa okuhle kakhulu.
Ngizochaza ukuthi kungani kalula. Cabanga ngembulunga. Iyindilinga futhi ibushelelezi kahle. Kodwa siyazi ukuthi uMhlaba wethu awubushelelezi kangako, kunezintaba ezinde njengeHimalaya, ulwandle olujulile njengeMariana Trench, nezinye izinto eziningi njengezigodi. Futhi uMhlaba awuyona indilinga ephelele. Kodwa imbulunga iwusizo olukhulu ekuqondeni ukuthi ikuphi iSri Lanka nokuthi ikuphi iMelika, akunjalo?
Ukuhlolwa kwe-keratometry kuyafana. Kulinganisa ukuma kwe-cornea yethu, kucatshangelwa ukuthi iyindilinga ephelele. Eqinisweni, amehlo ethu awawona amandilinga aphelele, futhi kunezinhlobo ezincane ngokwemvelo kuwo. Kodwa iyithuluzi eliwusizo kakhulu neliwusizo lokunquma ngokushesha nangokunembile ukuthi une-astigmatism.
Kulezi zinsuku, abanye odokotela bamehlo basebenzisa nokuhlolwa okuthuthukile kakhulu, njengokudweba imephu ye-cornea, okunganikeza izilinganiso ezinembile kakhudlwana.
Yiziphi lezi zibalo ze-keratometry (ukufundwa kwe-K)?
Imiphumela yalolu vivinyo ibizwa ngokuthi 'ukufundwa kwe-K' . Iyunithi yokulinganisa yalezi zinto ibizwa ngokuthi ama-diopters .
Ungakhathazeki ngalezi zinombolo nemininingwane. Lokhu kuzoqondakala kudokotela wakho. Uzobheka le miphumela bese enquma imbangela eqondile yokushintsha kombono wakho.
| Isimo samehlo | Uhlobo lokufunda lwe-K |
|---|---|
| I-cornea ephilile, eyindilinga (i-Cornea Ejwayelekile) | I-cornea yonke inenani elifanayo lika-K elingaguquki. Leli nani livame ukuba cishe ama-diopters angu-43. |
| Iso eline-astigmatism | Uzobona amanani amabili ka-K. Elilodwa lengxenye ejulile kakhulu yejika, kanti elinye lengxenye eyisicaba kakhulu. Umehluko phakathi kwala manani amabili ubonisa izinga lakho le-astigmatism. |
Lokhu kufundwa kwe-K kuzoqondisa udokotela wakho ekukhetheni izibuko ezifanele, amalensi okuxhumana, noma, uma kudingeka, ilensi efanele yokuhlinzwa.
Kufanele ngimbone nini udokotela wami?
Udokotela wakho uzokutshela ukuthi kufanele uhlolwe amehlo akho kangaki. Kubalulekile ukulandela leso simiso.
Ukuma kwamehlo ethu ngokwemvelo kuyashintsha ngokuhamba kwesikhathi, ngakho-ke izinga le-astigmatism lingashintsha. Kodwa-ke, uma ubona ushintsho olusheshayo nolubalulekile embonweni wakho, ikakhulukazi uma lufiphele kakhulu kunokujwayelekile, ungalushayi indiva. Kungaba uphawu lwesimo esifana ne -keratoconus esidinga ukwelashwa ngokushesha. Ngakho-ke uma ubona ushintsho olusheshayo nolubalulekile embonweni wakho, bona udokotela wakho ngokushesha.
Khumbula, lokhu akulona ukuhlolwa ongakuphumelela noma ongaphumeleli kukho. Kumane kuwukuhlolwa kokubona ukuthi amehlo akho asebenza kahle kangakanani. Kungakhathaliseki ukuthi i-astigmatism yakho imbi kangakanani, usengabona kahle ngezibuko ezifanele, ama-contact lens, noma ezinye izindlela zokwelapha.
Umlayezo Wokuya Nawe Ekhaya
- I-Keratometry iyindlela elula, engenabuhlungu, futhi ephephile yokuhlola ukugoba kwe-cornea yakho.
- Lokhu kukhomba kakhulu ukukhubazeka kokubona okuvamile okubizwa ngokuthi i-astigmatism.
- Imiphumela yokuhlolwa (ukufundwa kwe-K) izosiza udokotela wakho ukuthi akukhethele izibuko, amalensi okuxhumana, noma amalensi angemva kokuhlinzwa angcono kakhulu kuwe.
- Uma ubona ushintsho oluzumayo noma olubalulekile embonweni wakho, ungalushayi indiva bese ubona udokotela wamehlo ngokushesha.
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