Yuav ua li cas siv astigmatism hauv kab lus. Thaum tus menyuam tuav nws lub taub hau mus rau ib sab tas li ntawm saib cov khoom, astigmatism, ib qho yuam kev ntawm qhov muag, feem ntau qhia. Qhov no feem ntau yog vim muaj qhov tsis xwm yeem astigmatism nyob ze ntawm asymmetric meridian.
Dab tsi yog astigmatism hauv cov lus yooj yim?
Astigmatism: Ib hom kev pom kev tsis pom kev nyob rau hauv uas ib feem ntawm daim duab yog qhov muag plooj vim qhov tsis sib xws hauv lub dome-shaped curvature ntawm lub ntsej muag ntawm lub qhov muag, pob kws. Nrog astigmatism, lub teeb rays nkag mus rau lub qhov muag tsis zoo ib yam tsom rau ntawm retina. Qhov tshwm sim yog qhov muag tsis pom ntawm txhua qhov deb.
Yuav ua li cas nrog txoj cai astigmatism piv txwv?
Nrog-tus-txoj cai astigmatism, piv txwv li, yog ntau ntawm cov menyuam yaus qhov chaw ntsug meridian yog qhov siab tshaj plaws thiab nws nyob ze rau 90˚ Sib piv, hauv kev tawm tsam-tus- txoj cai astigmatism, kab rov tav meridian nyob ze rau 180˚, uas yog steeper tshaj qhov ntsug meridian.
Qhov twg yog qhov tseeb astigmatism lossis stigmatism?
Koj puas muaj "kev ntxub ntxaug"? Hom mob qhov muag no muaj lub npe tsis meej pem. Tej zaum koj yuav hais tias koj muaj "stigma" lossis "stigmata" hauv koj lub qhov muag, tab sis lub sijhawm tiag tiag yog astigmatism.
Koj puas tuaj yeem dig muag ntawm astigmatism?
Astigmatism yog ib qho teeb meem ntawm qhov muag tsom teeb qhov feem ntau tshwm sim los ntawm qhov tsis xws luag hauv lub lens, ua rau cov duab tsis zoo. Astigmatism tsis yog kab mob qhov muag lossis teeb meem kev noj qab haus huv. Thaum nws tuaj yeem ua rau pom qhov muag tsis pom kev, mob qhov muag, thiab mob taub hau, tshwj xeeb tshaj yog tom qab nyeem ntawv ntev, nws tsis ua rau qhov muag tsis pom
