1. Xav txog Lub Hom Phiaj: Txheeb xyuas qhov laj thawj tseem ceeb uas koj xav tau lub koob yees duab. Koj puas npaj siv nws los nyeem cov ntawv me me, tshuaj xyuas cov ntsiab lus zoo ntawm cov hniav nyiaj hniav kub lossis nyiaj npib, lossis koom nrog kev nyiam ua haujlwm lossis ua haujlwm? Kev nkag siab txog lub hom phiaj yuav pab koj txo qis rau qib uas tsim nyog.
2. Ntsuam xyuas Visual Acuity: Xav txog koj qhov kev pom qhov muag tam sim no lossis ib qho kev tsis pom kev tshwj xeeb uas koj muaj. Cov xwm txheej xws li hnub nyoog hloov pauv hauv kev pom, pom ze, lossis kev pom deb tuaj yeem cuam tshuam rau qib zoo tshaj plaws. Yog tias koj hnav lo ntsiab muag kho, coj qhov ntawd rau hauv tus account thiab.
3. Sim Sib Txawv Magnifications: Mus ntsib lub khw lossis qiv cov duab loj los ntawm cov phooj ywg lossis tsev neeg los sim ntau qib magnification. Sim nrog cov magnifiers sib txawv thiab pom qhov twg muab qhov pom tseeb tshaj plaws thiab nyiam tshaj plaws rau koj cov kev xav tau tshwj xeeb. Qhov kev sib koom tes no tuaj yeem pab koj txiav txim siab qhov tsim nyog ntawm kev nthuav dav uas haum rau koj lub zeem muag thiab cov kev xav tau.
4. Siv Diopter Conversion Chart: Magnification zog feem ntau ntsuas hauv diopters. Daim ntawv qhia kev hloov pauv diopter tuaj yeem pab koj nkag siab txog kev sib raug zoo ntawm lub zog loj thiab cov txiaj ntsig diopter. Piv txwv li, ib qho 2X magnification sib thooj rau ib qho +4 diopter, thaum lub 10X magnification yog kwv yees li +40 diopters. Los ntawm kev xa mus rau daim ntawv hloov dua siab tshiab, koj tuaj yeem kwv yees qhov diopter ntau yam uas sib haum nrog koj qhov kev xav tau ntawm kev nthuav dav.
5. Tham nrog tus kws kho qhov muag lossis tus kws kho qhov muag tsis pom kev: Yog tias koj muaj qhov tsis pom kev tshwj xeeb lossis xav tau qib siab dua, nws yuav zoo rau kev sab laj tus kws kho qhov muag lossis tus kws kho qhov muag tsis pom kev. Lawv tuaj yeem ntsuam xyuas koj qhov kev xav tau kev pom thiab muab cov lus pom zoo ntawm qib uas tsim nyog. Lawv kuj tuaj yeem hais qhia tshwj xeeb magnifiers lossis cov cuab yeej pabcuam raws li koj qhov kev xav tau tshwj xeeb.
6. Xav txog Adjustability: Qee qhov magnifiers muaj adjustable magnification theem lossis interchangeable lo ntsiab muag. Qhov kev hloov pauv no tuaj yeem pab tau yog tias koj xav tau ntau theem ntawm kev nthuav dav rau ntau yam haujlwm. Adjustable magnifiers tso cai rau koj hloov pauv qhov kev xav tau pom lossis ua kom haum cov khoom sib txawv nrog ntau qib ntawm kev nthuav dav.