Ib hom ntawm astigmatism, uas tus myopia prevails, hu ua myopic. Cov pathology lus dag hauv qhov tseeb tias qhov tseem ceeb ntawm cov ntaub ntawv ntawm qhov muag pom tsis tau nqa ntawm ib qho ntawm qhov retina ntawm txhua qhov muag, raws li nws yuav tsum tau nrog rau cov kev qis indices, tab sis hauv ob thaj chaw. Thiab ntawm retina nws tus kheej, tsuas yog ib feem ntawm daim duab.
Tus mob myopic astigmatism yog dab tsi?
Tus kab mob no tuaj yeem kis tau los ntawm kev siv phais mob rau lub qhov muag, kev puas tsuaj los yog ua ib qho kab mob ntawm cov kab mob. Myopic astigmatism kuj tshwm sim thaum yug los.
Tsis tas li ntawd, cov kab mob pathology no tau muab tso rau hauv cov hlab ntsha thiab lens nrog qhov sib txawv ntawm qib siab: qaug zog thiab loj heev.
Astigmatism yog yooj yim myopic
Kev kuaj mob thiab kev tsim ntawm lub complexity ntawm tus kab mob yog nqa tawm los ntawm kev soj ntsuam cov meridians ntawm lub qhov muag. Yooj yim astigmatism yog ib qhov tshwj xeeb los ntawm kev xav txog qee lub teeb rays ncaj qha rau ntawm retina, thiab lwm qhov - nyob rau hauv pem hauv ntej ntawm nws. Hauv qhov no, lub zeem muag yog qhov qub hauv ib qho chaw meridian, thiab cov hlab pas hauv ob.
Tshaj ncaj qha myopic astigmatism
Hom kab mob no yog tus cwj pwm los ntawm qhov tseeb hais tias lub retina tsis mus txog kiag li tag nrho cov teeb rays, tab sis tsom rua ntawm ntau cov ntsiab lus nyob rau hauv pem hauv ntej ntawm nws. Thaum kuaj cov lus meridians ntawm lub qhov muag, nws yog qhov tseeb tias myopia nyob rau hauv ob qho tib si, tab sis nrog ntau yam degrees loj.
Feem ntau cov myopic astigmatism ntawm ob lub qhov muag tau tshwm sim ntau zaus thiab yog cov tsos mob ntawm cov tsos mob loj dua:
- Txo qhov pom tseeb ntawm cov khoom siv;
- distortion;
- pos huab duab xaav.
Myopic astigmatism - kev kho mob
Kev qaug zog ntawm pathology tuaj yeem kho kho mob tshwj xeeb uas tsim lub qhov muag, hnav cov tsom iav , tiv thaiv kev sib txuas lus.
Ib qho kev kawm loj feem ntau yuav tsum tau siv txoj kev phais mob, vim hais tias cov txheej txheem kev txheeb xyuas tau ua rau muaj kev tawm tsam ntawm mob taub hau thiab tsis xis nyob hauv ob lub qhov muag. Kev khiav dej num kom tshem tawm cov myopic astigmatism yog raws li nram no:
- laser keratomileus (kev kho ntawm cov duab ntawm cornea nrog ib kab teeb laser);
- astigmatic keratotomy (microdermabrasion ntawm lub pob kws);
- photorefractive keratectomy (kev kho ntawm lub taub hau los ntawm kev tshem tawm ntawm nws cov txheej sab qaum tsis muaj kev puas tsuaj ntawm lwm cov nqaij).