Keratometry (K) yog ntsuas ntawm lub pob txha curvature; corneal curvature txiav txim lub hwj chim ntawm lub cornea. Qhov sib txawv ntawm lub hwj chim thoob plaws lub cornea (opposite meridians) ua rau astigmatism; Yog li, keratometry ntsuas astigmatism.
Lub hauv paus ntsiab lus ntawm Keratometry yog dab tsi?
Keratometry ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kaw cov duab loj cuam tshuam los ntawm cov khoom paub qhov loj. Muab cov khoom loj thiab qhov deb ntawm daim duab mus rau qhov khoom, lub vojvoog ntawm curvature ntawm lub cornea tuaj yeem xam.
Keratometry yog dab tsi?
Tus phau ntawv keratometer yog qhov tseeb tshaj plaws, txawm hais tias tsis muaj qhov sib txawv ntawm cov keratometers (p > 0.05). Tag nrho cov keratometers ua tiav qhov nruab nrab keratometric yuam kev tsawg dua ib diopter.
Dab tsi ntawm lub cornea ntsuas Keratometry?
Keratometer ntsuas lub ntsej muag lub ntsej muagtab sis siv qhov ntsuas qhov ntsuas ntawm qhov cuam tshuam (1.3375 es tsis yog qhov tseeb 1.376) txhawm rau suav rau qhov kev pab me me los ntawm lub pob ntseg tom qab, corneal thickness, thiab tseem tso cai rau 45 D kom sib npaug 7.5 hli vojvoog ntawm curvature (K (diopters)=337.5 / r).
corneal topography siv rau dab tsi?
pob ntseg topography tsim cov ncauj lus kom ntxaws, pom kev piav qhia ntawm cov duab thiab lub zog ntawm lub pob kws. Hom kev tshuaj ntsuam no muab rau koj tus kws kho mob nrog cov ntsiab lus zoo heev txog qhov xwm txheej ntawm lub pob txha pob txha. Cov nocov ntsiab lus yog siv rau kuaj mob, saib xyuas, thiab kho ntau yam qhov muag.
