Kev kuaj pom qhov tseeb tseeb

Kev ntsuas qhov tseeb pom yog siv los txiav txim siab cov tsiaj ntawv me tshaj plaws uas koj tuaj yeem nyeem ntawm daim qauv ntsuas (Snellen chart) lossis daim npav tuav 20 fim (6 metres) deb. Cov kab kos tshwj xeeb tau siv thaum ntsuas ntawm qhov kev ncua deb luv dua 20 feet (6 metres). Qee qhov kab kos Snellen yog qhov tseeb saib cov yeeb yaj kiab uas qhia cov tsiaj ntawv lossis duab.

Qhov kev ntsuas no tuaj yeem ua nyob hauv chaw saib xyuas kev noj qab haus huv chav ua haujlwm, tsev kawm ntawv, chaw ua haujlwm lossis lwm qhov.

Koj yuav raug thov kom tshem koj lub tsom iav lossis iav lo ntsiab muag thiab sawv lossis zaum 20 feet (6 meters) ntawm daim duab qhia qhov muag. Koj yuav kom ob lub qhov muag qhib.

Koj yuav raug hais kom npog ib lub qhov muag nrog xib teg ntawm koj txhais tes, ib daim ntawv, lossis ib lub duav me me thaum koj nyeem tawm nrov nrov ntawm kab me tshaj plaws ntawm cov tsiaj ntawv koj tuaj yeem pom ntawm daim duab. Cov lej, cov kab, lossis cov duab raug siv rau cov neeg tsis paub nyeem ntawv, tshwj xeeb yog menyuam yaus.

Yog koj tsis paub meej txog tsab ntawv, koj tuaj yeem twv. Qhov kev kuaj no tau ua rau txhua lub qhov muag, thiab ib qho zuj zus. Yog tias xav tau, nws yuav rov ua dua thaum koj hnav koj lub tsom iav lossis tiv tauj. Koj tseem yuav hais kom nyeem cov tsiaj ntawv lossis cov lej los ntawm daim npav uas muaj 14 ntiv tes (36 centimeters) ntawm koj lub ntsej muag. Qhov no yuav kuaj koj lub zeem muag ze.

Tsis muaj kev npaj tshwj xeeb yog qhov tsim nyog rau qhov kev ntsuas no.

Tsis muaj qhov tsis xis nyob.

Kev kuaj qhov muag pom yog lub sijhawm ib txwm muaj ntawm kev soj ntsuam qhov muag lossis kuaj lub cev ib txwm muaj, tshwj xeeb yog tias muaj qhov hloov ntawm lub zeem muag lossis teeb meem tsis pom kev.

Hauv cov menyuam yaus, kev ntsuam xyuas raug ntsuas los ntsuas cov teeb meem tsis pom kev. Cov teeb meem tsis pom kev hauv cov menyuam yaus feem ntau tuaj yeem raug kho lossis txhim kho. Cov teeb meem tsis txhim kho lossis tsis kho mas yuav ua rau pom kev puas tsuaj mus tas li.

Muaj lwm txoj hauv kev los kuaj xyuas lub zeem muag hauv cov menyuam yaus me, lossis hauv cov neeg uas tsis paub lawv cov tsiaj ntawv lossis lej.

Kev pom tseeb pom tseeb ua ib feem.

• Tus naj npawb saum toj yog hais txog qhov kev ncua deb koj sawv ntawm kab ntawv. Qhov no feem ntau yog 20 feet (6 metres).
• Tus lej hauv qab qhia qhov kev ncua deb ntawm tus neeg uas lub qhov muag pom tseeb tuaj yeem nyeem tib kab koj tau nyeem kom raug.

Piv txwv li, 20/20 yog suav tias tsis muaj dab tsi. 20/40 taw qhia tias kab koj tau nyeem kom raug li ntawm 20 ko taw (6 meters) deb tuaj yeem nyeem los ntawm tus neeg uas tsis pom kev zoo los ntawm 40 taw (12 meters) deb. Sab nraum Tebchaws Asmeskas, kev pom zoo pom tseeb yog qhia raws li tus lej zauv. Piv txwv, 20/20 yog 1.0, 20/40 yog 0.5, 20/80 yog 0.25, 20/100 yog 0.2, thiab lwm yam.

Txawm hais tias koj ncua ib los sis ob tsab ntawv ntawm kab me tshaj plaws koj tuaj yeem nyeem, koj tseem raug txiav txim siab kom muaj lub zeem muag sib luag rau txoj kab ntawd.

Cov txiaj ntsig tsis zoo yuav yog qhov taw qhia uas koj xav tau tsom iav lossis tiv tauj. Lossis nws txhais tau tias koj muaj mob qhov muag uas yuav tsum muaj kev ntsuam xyuas ntxiv los ntawm tus kws khomob.

Tsis muaj kev pheej hmoo nrog qhov kev ntsuas no.

Qhov muag kuaj - pom tseeb tseeb; Kev kuaj qhov muag - acuity; Snellen xeem

• Qhov muag
• Kev kuaj pom qhov tseeb tseeb
• Li qub, nearsightedness, thiab farsightedness

Feder RS, Olsen TW, Prum BE Jr, li al. Cov neeg laus kho qhov muag kho qhov muag Cov Txiaj Ntsim nyiam Xyaum Cov Qauv Cov Lus Qhia. OphthalmologyCov. 2016; 123 (1): 209-236. PMID: 26581558 www.ncbi.nlm.nih.gov/pubmed/26581558.

Rubin GS. Kev pom tseeb thiab qhov sib txawv ntawm tus kheej. Hauv: Schachat AP, Sadda SVR, Hinton DR, Wilkinson CP, Wiedemann P, eds. Ryan's RetinaCov. 6 tus ed. Philadelphia, PA: Elsevier; 2018: chap 13.