Esikhathini esiningi, ukulahlekelwa kombono we-peripheral kubhekiselwa ekutheni ukubonakala kwendawo ebonakalayo, okusho ukuthi awukwazi ukubona uhlangothi olulodwa lombono kusuka kwelinye lamehlo akho noma awukwazi ukubona uhlangothi olulodwa lwombono kusuka kokubili kwamehlo akho. Ukunqunywa kwensimu ebonakalayo kuthiwa yi-hemianopsia noma i-hemianopia. Uma zombili amehlo enenkinga ehambisanayo nombono we-peripheral, ubizwa ngokuthi i-hemianopsia engaziwa ngamuntu.
I-Stroke Yenza Kanjani Ukusikwa Kwensimu Ebonakalayo?
Kuyinto engavamile ukushaywa umonakalo okwenza insimu ebonakalayo ibheke ngenxa yokuthi indlela ephakathi kwamehlo nendawo yobuchopho ehumusha lokho esikubonayo kuyindlela ende engakwazi ukulimala kalula ngengozi.
Uhlangothi lwesobunxele lobuchopho lubophezele ekuboneni ohlangothini olufanele lombono ovela kuzo zombili amehlo ngenkathi uhlangothi olufanele lobuchopho lubhekene nokubona ohlangothini lwesobunxele bombono ovela kuzo zombili amehlo.
Izibhamu ezibandakanya i-lobe ye-parietal noma i- lophi occipital yiyona ndlela engabangela ukuba i-hemianopsia engaziwayo.
Ngezinye izikhathi i-hemianopsia ithinta lonke uhlangothi lwesokudla noma lonke uhlangothi lwesobunxele lunye noma kokubili amehlo, futhi ngezinye izikhathi kuthinta kuphela ilungelo elingezansi noma elingaphansi kwesobunxele noma kuphela ohlangothini olungenhla noma olwesokunxele kwesokunxele. Lolu hlobo lwensimu ebonwayo luvame ukubizwa ngokuthi i-quadrantanopia ephezulu noma i-quadrantanopia engaphansi ngoba ithinta cishe u-ΒΌ kwendawo ebonakalayo esikhundleni se-1/2 yensimu ebonakalayo.
Ukwahlukana Phakathi Kokunqunywa Kwensimu Ebonakalayo Nesizungu Esibukwayo
Lokhu kuhlukaniswa okucashile okungase kungenzi umehluko osebenzayo empilweni yakho yansuku zonke.
Umuntu onesi-hemianopsia 'uphuphuthekisa' indawo yombono wendawo. Umuntu onobuso obubonakalayo we-hemiagnosia, ngakolunye uhlangothi, angase akwazi ukubona ohlangothini olungakwesokudla, kodwa uyakunaki ngokuphelele.
Lokhu kufana ne- hemiagnosia yendawo engavamile, noma ukungahlonishwa kwendawo, isifo lapho abasindile besifo bezinqabe khona uhlangothi lonke lomhlaba ngoba abaqapheli lelo cala ngemva kokushaywa yisifo.
Ingabe Ukulahlekelwa Kombono Wemiphongolo Kungcono?
Njengemivimbo eminingi, ukushaywa komzimba okubangela ukulahlekelwa kombono wendawo kungathuthuka ngokuhamba kwesikhathi njengoba isifo sisindisa futhi siqinisa .
Ukuphila Ngombono Wokulahlekelwa Kombono
Kukhona ama-prisms akhethekile nezinsiza ezibukwayo ezingasiza ekuqondiseni nasekuqedeni ukusikwa kwensimu ebonakalayo.
Into ebaluleke kunazo zonke uma ulahlekelwa umbono wakho wendawo yokukhokha ukukhokha ngokukhethekile ohlangothini lwangaphandle ongakwazi ukuyibona. Ngeshwa, abantu abaningi ababhekene nokulahlekelwa kwendawo ebonakalayo abakwazi ukukhokha indawo eyimpumputhe uma isifo siwukhulu. Abanye abantu abanomkhakha wokubukwa babone ukuthi inkinga uma isifo sithinte ingxenye enkulu ye-lobe ye-parietal, ebangela ukunganaki kwendawo.
Ukukhathazeka okubaluleke kakhulu ngemuva kokulahlekelwa kombono wendawo ukuphepha, ikakhulukazi uma kuziwa ekushayela.
Uma ungumnakekeli womuntu onoma yiluphi uhlobo lokulahlekelwa kwensimu ebonakalayo, kungakhathaliseki ukuthi i-hemianopsia noma i-quadrantanopia, kubalulekile ukuba ubuke futhi ukuxwayisa okuthandayo kwezinto ezintweni ezingaboni.
Izimbangela
Kunezinye izimbangela ezimbalwa ze-hemianopsia engaziwayo. Ezinye izinhlobo zekhanda le-migraine zingabangela ukulahlekelwa okwesikhashana kombono wendawo okuthuthukisa.
Kubalulekile ukutshela udokotela wakho uma unenkinga ngombono wakho wendawo ukuze uqiniseke ukuthi akuyona inkinga yenkinga enkulu kakhulu, njenge-stroke, ne-aneurysm yobuchopho noma isisu sobuchopho.
Umthombo
Umbono we-Agnosic ugcwele, uMartelli M, Strappini F, Di Pace E, Pelli D, Journal of Vision, September 2015