Qhov Teeb Meem Ntawm Cov Tub Kawm Ntawv Ntawm Kev Nyeem Ntawv

Thaum hnav tsom iav nyeem ntawv thawj zaug, koj yuav tsum paub txog qhov ze ntawm PD (cov menyuam kawm ntawv nyob deb), vim muaj cov nyhuv ntawm tib neeg lub qhov muag thaum pom nyob ze, qhov pom kev axis tig mus rau sab hauv, ua rau cov menyuam kawm ntawv nyob ze (33cm nyeem ntawv nrug. ua piv txwv) me dua qhov deb (head-up) PD 4 ~ 6mm. Cov tsom iav nyeem ntawv muaj qhov ntsuas qhov muag tseem ceeb OCD (kab rov tav nrug ntawm qhov chaw nruab nrab ntawm ob lub lo ntsiab muag), OCD thiab PD yuav tsum ua raws li qhov ua tau. Lub teb chaws tus qauv tau teev tseg tias muaj qhov sib txawv ntawm ob, hnub poob liab tsom iav nyeem ntawv raws li lub teb chaws tus qauv cuam tshuam cov kev cai ntawm ± 3mm kam rau ua, uas yog hais, ib tug nyob ze PD =62mm qhua, xaiv cov kev nyeem ntawv iav OCD tus nqi tuaj yeem nyob nruab nrab ntawm 59-65mm. Txawm li cas los xij, qhov kev daws teeb meem zoo tshaj plaws yog xaiv cov tsom iav nrog tus nqi OCD tsawg dua li cov tub ntxhais kawm nyob deb. Kev hnav tsom iav nrog tus nqi OCD ntau dua li cov menyuam kawm ntawv nyob deb yuav ua rau mob qhov muag, nkees nkees, thiab tsis muaj peev xwm ua kom pom kev pom. Yog tias cov menyuam kawm ntawv nyob deb dhau los me me thiab loj dhau, yog li tsis tuaj yeem xaiv daim iav, daim iav tsis tuaj yeem sib sau ua ke (tsis muaj thav duab loj, daim loj), ces cov tsom iav nyeem ntawv tsis yog qhov zoo tshaj plaws.