Tsav tsheb, xyuas koj lub qhov muag
Ntau npaum li cas cov neeg tsav tsheb tau kuaj xyuas lawv qhov muag? Feem ntau thaum thov rau daim ntawv tsav tsheb. Tom qab ntawd, yog tias tsis pom qhov tsis pom kev nyob rau theem no, lawv tsis tas yuav ua li ntawd thiab yuav ua rau tsis pom qhov muag tsis pom. Cov neeg tsav tsheb tsis pom kev pom pom cov cim lig dhau lawm thaum tsav tsheb yam tsis muaj tsom iav lossis cov iav tiv thaiv, uas tuaj yeem ua rau muaj kev cuam tshuam sai thiab muaj xwm txheej tsheb khiav.
Thaum peb tsis pom cov tsos mob ntawm qhov muag tsis pom kev, nws yog ib qho tsim nyog yuav tsum tau soj ntsuam qhov tsis pom kev tsawg kawg ib zaug txhua 4 xyoos, vim tias qhov tsis xws luag yuav tshwm sim los yog tob zuj zus. Qhov no yuav tsum tau ua ntau zaus los ntawm cov neeg tsav tsheb tshaj 40, vim tias tshwj xeeb tshaj yog tom qab ntawd muaj kev pheej hmoo ntawm qhov muag tsis pom.
Tus neeg tsav tsheb ntawm lub tsheb uas tsis pom kev ntawm -1 diopter (tsis muaj kev kho) pom txoj kev kos npe tsuas yog los ntawm qhov deb li ntawm 10 meters. Tus neeg tsav tsheb yam tsis muaj qhov muag tsis pom kev lossis taug kev nrog cov tsom iav kho qhov muag lossis lub qhov muag pom kev tuaj yeem pom cov paib tsheb los ntawm qhov deb li ntawm 25 meters. Qhov no yog qhov kev ncua deb uas muab sijhawm txaus los kho lub caij tsheb mus rau cov xwm txheej uas tau teev tseg los ntawm kev kos npe. Yog tias peb muaj kev tsis ntseeg, nws tsim nyog ua qhov kev sim ntawm peb tus kheej thiab xyuas seb peb puas tuaj yeem nyeem daim ntawv tso cai los ntawm qhov deb ntawm 20 meters. Yog tias tus neeg tsav tsheb ua tsis tiav qhov kev xeem no, nws yuav tsum tau kuaj xyuas nws lub zeem muag los ntawm tus kws kho qhov muag, qhia Zbigniew Veseli, tus thawj coj ntawm lub tsev kawm tsav tsheb Renault.
Nws tshwm sim tias qhov poob ntawm qhov muag pom kev yog ib ntus thiab cuam tshuam nrog kev ua haujlwm ntau dhau. Cov tsos mob feem ntau yog qhov muag kub hnyiab, qhov muag dej, thiab "xav xuab zeb". Nyob rau hauv cov xwm txheej zoo li no, nws tsim nyog ua ntau yam kev tawm dag zog los txo qhov nro ntawm lub qhov muag, piv txwv li, kos ib daim duab yim hauv huab cua nrog lub qhov muag lossis tsom ob peb zaug ntawm cov khoom uas nyob ntawm ob peb kaum centimeters deb ntawm peb, thiab ces cov nyob deb. Yog li, peb lub zeem muag yuav so me ntsis. Yog tias cov tsos mob tshwm sim thiab so thiab kev tawm dag zog tsis pab, yuav tsum tau kuaj xyuas qhov muag pom.
Yog tias tus neeg tsav tsheb raug kuaj pom tias muaj qhov tsis pom kev, nws yuav tsum nco ntsoov hnav tsom iav lossis lo ntsiab muag tsim nyog thaum tsav tsheb. Nws yog ib qho tsim nyog kom muaj cov iav seem hauv lub tsheb. Visual acuity yog qhov tseem ceeb rau txoj kev nyab xeeb.
