Eyesight vs Vision
Peb qhov muag pom kev lossis qhov pom kev yog qhov pab peb tshaj plaws hauv kev txhais lub ntiaj teb nyob ib puag ncig peb. Qhov muag pom thiab tsis pom kev yog ob ntawm ntau lo lus siv los hais txog qhov kev xav no. Kev pom kev pom tsis tau tsuas yog nrog peb lub qhov muag xwb vim nws tseem koom nrog peb lub hlwb kom paub txog tej yam hauv peb ib puag ncig tam sim ntawd thiab peb txoj kev kawm thiab kab lis kev cai. Ntau tus neeg xav tias qhov muag thiab qhov muag yuav zoo ib yam lossis sib txawv txawm tias tseem muaj qhov sib txawv uas yuav tau tham txog hauv kab lus no.
Qhov muag pom
Thaum koj pib muaj teeb meem nyeem ntawv xov xwm lossis nyeem cov ntawv nyeem lossis ntsej muag hauv TV, koj mus ntsib kws kho qhov muag hu ua ophthalmologist lossis tus kws kho qhov muag uas kuaj xyuas koj qhov muag los ntawm kev ua rau koj saib daim duab nrog cov lej thiab cov tsiaj ntawv sau tshaj nws nyob rau hauv ntau txoj kab thiab hais kom koj txheeb xyuas lawv los ntawm ib tug deb ntawm hnav tsom iav sib txawv. Nws yog tus neeg txiav txim siab lub hwj chim ntawm lo ntsiab muag lossis tsom iav uas peb yuav tsum hnav kom muaj cov duab meej tsim los ntawm peb lub qhov muag. Peb muaj qhov muag pom kev zoo thaum peb pom cov duab meej tsim nyob tom qab ntawm peb lub qhov muag. Peb qhov pom kev pom tau raug sim ob qho tib si los ntawm qhov deb (20 ko taw) thiab nyob ze (nyeem nrug ntawm 16 ntiv tes). Thaum peb tuaj yeem pom cov duab meej ntawm qhov deb ntawm 20 ko taw, peb tau hais tias muaj 20/20 qhov muag uas yog hu ua raws li ib feem tsim los ntawm Dutch ophthalmologist Snellen. Yog tias koj qhov muag pom ntawm 20/40, nws txhais tau tias koj qhov muag pom tsuas yog ib nrab zoo li qhov muag ib txwm li 20/20 tsuas yog 50% ntawm qhov muag pom xwb.
Vision
Yog koj muaj 20/20 qhov muag pom, tsis tau lees tias koj muaj lub zeem muag zoo meej. Qhov no yog vim hais tias kev nyeem ib daim ntawv uas muaj cov tsiaj ntawv thiab cov lej hauv cov teeb pom kev sib txawv tsuas yog ib txoj haujlwm tshwj xeeb xwb, thaum peb ob lub qhov muag yuav tsum ua ntau yam haujlwm sib txawv thiab nyuaj hauv peb lub neej txhua hnub. Muaj ib lo lus hu ua binocular vision uas hais txog qhov tseeb ntawm peb lub qhov muag ua haujlwm ua pab pawg kom paub tseeb tias peb pom meej hauv txhua yam. Qhov no yog vim li cas peb thiaj li pom kev tsis zoo txawm tias peb yuav muaj 20/20 qhov muag pom yog tias peb lub qhov muag tsis zoo raws li qhov yuav tsum tau ua. Nws muaj peev xwm rau cov neeg uas muaj 20/20 qhov muag pom qhov muag tsis pom kev lossis raug mob taub hau vim qhov teeb meem no. Kev nyeem ntawv sib txawv xav kom peb ob lub qhov muag ua haujlwm tandem raws li cov ntsiab lus sib txawv. Piv txwv li, lub hauv paus ntsiab lus ntawm convergence yog nyob rau hauv kev ua hauj lwm thaum peb ua hauj lwm nyob rau hauv lub computer raws li nws yuav tsum tau peb ob lub qhov muag yuav tsum tau taw tes rau hauv me ntsis. Kev nyeem ntawv los ntawm cov ntawv xov xwm thiab saib cov yeeb yaj kiab hauv chav tsaus ntuj xav kom peb lub qhov muag hloov pauv sai sai thiab los ntawm ib qho mus rau lwm qhov. Qhov no hu ua chaw nyob.
Qhov Qhov Muag Pom Kev Pom Qhov Pom Qhov txawv yog dab tsi?
• Txawm tias qhov muag thiab qhov muag yog cov ntsiab lus sib xws, qhov muag pom yog hais txog qhov pom tseeb ntawm cov duab tsim los ntawm peb lub qhov muag thaum pom kev yog qhov peb lub qhov muag thiab lub hlwb tsim tawm ntawm peb ib puag ncig, thiab qhov no yog nyob ntawm ntau yam sib nrug ntawm qhov muag.
• Peb mus kuaj peb qhov muag thaum peb muaj teeb meem nyeem phau ntawv lossis saib TV lossis lwm yam khoom nyob deb.
• 20/20 qhov muag tsis tau txhais hais tias peb tsis pom kev zoo tag nrho vim muaj lwm yam teeb meem ua rau pom qhov muag tsis pom lossis mob taub hau.
