LY-23CE chart FOR VISUAL ACUITY
1. Daim Ntawv Qhia E rau Visual Acuity yog cov cuab yeej siv feem ntau hauv cov khw muag khoom kho qhov muag. Nws siv cov vaj huam sib luag zoo uas muaj zog, tawv, thiab tsis yooj yim tawg, ua kom muaj kev nyab xeeb siab. Cov optotypes ntawm daim ntawv yog luam tawm siv silk screen printing, kom ntseeg tau meej thiab tsis kam mus fading.
2. Daim ntawv qhia lub teeb ci LED tuaj yeem lav qhov ci ci thiab ua haujlwm ntev. Nws emits lub teeb uniformly, kom ntseeg tau qhov muag kev tiv thaiv, lub zog efficiency, ib puag ncig tus phooj ywg, lub neej ntev kev pab cuam, thiab siab kev ruaj ntseg nta.
3. Daim duab qhia qhov tseem ceeb ntawm kev tiv thaiv qhov muag, kev noj qab haus huv, thiab kev nyab xeeb. Nws ua haujlwm ntawm DC tsav, tshem tawm flickering thiab tsis muaj teeb meem xws li mercury thiab xenon. Nws kuj zam kev cuam tshuam electromagnetic. Qhov hluav taws xob thiab tam sim no khaws cia qis, ua rau muaj hluav taws kub tsawg thiab tsis muaj kev phom sij rau kev nyab xeeb.
4. Daim ntawv qhia yog nruab nrog lub vaj huam sib luag tiv thaiv, thiab sab nraub qaum yog ua los ntawm cov khoom siv high-density los xyuas kom meej qhov ci hauv lub teeb thiab tiv thaiv lub teeb to.
5. Daim Ntawv Qhia E rau Visual Acuity tuaj yeem muab tso rau ntawm lub rooj lossis dai rau ntawm phab ntsa.
6. Nws kuj suav nrog daim ntawv qhia astigmatism thiab cov kab liab / ntsuab.
7. Kev ua haujlwm yooj yim. Cia li tso tus E Daim Ntawv Qhia rau Kev Pom Kev Pom Zoo kom raug, tig rau, thiab kom tus neeg kuaj pom qhov deb 3 meters deb ntawm lub teeb lub teeb. Kuaj txhua lub qhov muag cais los ntawm kev npog ib qho nrog ib daim ntaub thaiv thaum kuaj xyuas lwm tus.
Nta ntawm E Daim Ntawv Rau Kev Pom Kev Pom Kev
Cov ntawv qhia "E" Letters:Tsis zoo li cov kab kos ib txwm siv uas siv ntau yam tsiaj ntawv, tus lej, lossis cov cim, E daim ntawv ntsuas qhov muag tshwj xeeb tshwj xeeb rau tsab ntawv "E." Cov ntawv "E" no tau nthuav tawm nyob rau hauv ntau txoj kev taw qhia-nce, nqis, sab laug, thiab sab xis. Qhov no tshem tawm qhov kev xav tau ntawm qhov kev xeem kom paub txog cov ntawv tshwj xeeb, ua rau daim ntawv qhia tsim nyog rau cov neeg uas tsis paub cov tsiaj ntawv.
Kev Qhia Taw Qhia:Cov kev xeem raug nug kom txheeb xyuas cov kev taw qhia uas txhua tus "E" tab tom ntsib (nce, nqis, sab laug, lossis sab xis). Qhov kev ntsuam xyuas no yog hom lus ywj pheej thiab tsis tso siab rau kev muaj peev xwm nyeem lossis paub cov ntawv. Hloov chaw, nws tsom mus rau tus neeg lub peev xwm los nkag siab thiab paub qhov txawv ntawm kev taw qhia ntawm cov duab yooj yim.
Qhov ntau thiab tsawg yuav maj mam txo:Zoo ib yam li cov kab kos kab lis kev cai, E Chart For Visual Acuity nthuav tawm cov kab "E" cov ntawv uas txo qhov loj me thaum koj txav ntawm sab saum toj mus rau hauv qab. Qhov no tso cai rau tus neeg kuaj xyuas los txiav txim qhov me me ntawm cov ntawv "E" uas cov ntawv xeem tuaj yeem txheeb xyuas kom raug, uas qhia txog lawv qhov pom kev zoo.
Visual Acuity Measurement:Qhov pom kev pom ntawm qhov kev xeem yog txiav txim siab los ntawm kab me me ntawm "E" cov ntawv lawv tuaj yeem txheeb xyuas tau raug. Kev ntsuas feem ntau yog sau tseg raws li ib feem, nrog tus lej sawv cev rau qhov ntsuas qhov deb (feem ntau yog 20 feet) thiab tus lej sawv cev rau qhov kev ncua deb ntawm tus neeg uas muaj qhov pom kev zoo ib txwm muaj peev xwm txheeb xyuas cov ntawv loj tib yam.
Haum rau cov neeg tsis paub ntawv:Daim Ntawv Qhia E Rau Kev Pom Kev Pom Kev siv rau cov neeg tsis paub ntawv, cov menyuam yaus, cov neeg muaj kev loj hlob tsis taus, lossis cov uas tsis paub cov tsiaj ntawv. Txij li nws tsis vam khom rau kev lees paub cov ntawv, nws tuaj yeem muab cov kev ntsuam xyuas pom tseeb ntawm cov neeg coob coob.
Kev siv tshuaj kho mob thiab tshawb fawb:Daim Ntawv Tumbling feem ntau yog siv rau hauv chaw kho mob xws li chaw kho qhov muag thiab kev coj ua optometry los ntsuas qhov pom kev pom. Nws kuj tseem ua haujlwm hauv kev tshawb fawb kev tshawb fawb uas yuav tsum tau ntsuas qhov pom kev pom kev zoo thoob plaws ntau haiv neeg.
Standardized Test:Daim ntawv E rau kev pom kev muab ib txoj hauv kev los ntsuas qhov pom kev pom, ua kom muaj kev ntsuam xyuas zoo ib yam ntawm cov neeg soj ntsuam sib txawv thiab teeb tsa. Qhov no ua rau nws yog ib qho cuab yeej txhim khu kev qha rau kev taug qab cov kev hloov pauv hauv qhov pom kev pom lub sijhawm los yog sib piv cov txiaj ntsig ntawm tib neeg.
Yuav Siv E Daim Ntawv Qhia Li Cas Rau Kev Pom Kev Pom Kev?
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Muab daim duab tso rau ntawm phab ntsa ntawm qhov deb ntawm 10 ko taw.
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Kom tus neeg npog ib lub qhov muag (tsis tas siv lub siab rau nws) kom lawv lub zeem muag raug kaw.
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Pib nrog thawj kab nyob rau sab saum toj ntawm daim duab thiab kom tus neeg taw tes nrog lawv cov ntiv tes cov kev taw qhia cov "ntiv tes" ntawm E yog taw tes.
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taw tes rau txhua tus "E" mus rau sab laug mus rau sab xis ntawm sab saum toj mus rau hauv qab.
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Thaum tus neeg tsis tuaj yeem txheeb xyuas qhov kev taw qhia ntawm tsawg kawg 50 feem pua ntawm Es ntawm kab nres qhov kev xeem thiab nco ntsoov cov kab dhau los lawv tuaj yeem txheeb xyuas qhov tsawg kawg yog 50% ntawm qhov poob E's.
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Rov ua cov kauj ruam saum toj no rau lwm qhov muag.
Cim npe nrov: e daim ntawv qhia rau kev pom kev pom kev, Tuam Tshoj e daim ntawv qhia rau kev pom kev pom kev zoo, lub Hoobkas
Specifications:
1. Ua haujlwm nrug: 3.0M
2. Loj: 30 * 60CM
3. Fais fab mov: AC110V, 60HZ, AC220V, 50HZ
4. GW: 1.7 KGS
5. Pob: 69 * 7.5 * 36CM
