Muaj ntau qhov laj thawj yog vim li cas koj thiaj xav paub tias lub qhov muag twg yog tus tseem ceeb tshaj. Dhau li yog qhov nthuav, nws tseem muaj txiaj ntsig rau kev ua ub no uas siv ib lub qhov muag, xws li thaum siv lub tshuab tsom iav, tsom iav tsom iav, lossis tsom lub koob yees duab yam tsis muaj lub vijtsam saib. Koj tus kws kho qhov muag kuj tseem xav txiav txim siab koj lub qhov muag tseem ceeb rau qee yam kev kho mob. Koj tuaj yeem yooj yim pom koj tus kheej hauv tsev. Tab sis thov nco tseg, cov txiaj ntsig tuaj yeem sib txawv nyob ntawm qhov nrug koj sim nws.
Kauj ruam
Txoj Kev 1 ntawm 2: Ntsuam Xyuas Koj Qhov Muag Qhov Muag
Kauj Ruam 1. Sim qhov ntsuas ntsuas yooj yim
Nrog ob lub qhov muag qhib, taw koj tus ntiv tes taw ntawm qhov taw tes ntawm qhov deb. Kaw ib lub qhov muag, tom qab ntawd hloov thiab kaw lwm lub qhov muag. Koj tus ntiv tes yuav tshwm sim los yog txav deb ntawm qhov khoom thaum ib lub qhov muag kaw. Yog tias tus ntiv tes tsis zoo li txav mus, ces lub qhov muag uas koj kaw yog lub qhov muag tsis tseem ceeb.
Lwm qhov kev hloov pauv ntawm kev sim yog kom rub koj txhais caj npab kom deb ntawm koj xub ntiag thiab tsim ib lub qhov voos peb sab nrog koj cov ntiv tes. Dhau ntawm lub qhov no, ntsia ntawm ib qho khoom kwv yees li 3 metres deb nrog ob lub qhov muag qhib. Tsis txav, kaw ib lub qhov muag, tom qab ntawd lwm qhov. Cov khoom yuav tshwm sim kom txav mus, tejzaum nws tawm ntawm "lub qhov rai daim duab peb sab" thaum koj kaw ib lub qhov muag. Yog tias qhov khoom txav mus, koj tab tom saib nrog qhov muag tsis pom
Kauj Ruam 2. Ua qhov "Hole in Card - Remote" test
Qhov kev ntsuas no ntsuas qhov muag uas koj siv los tsom mus rau qhov khoom uas nyob deb 3 meters. Koj tuaj yeem yooj yim ua nws tus kheej hauv tsev.
- Ua ib lub qhov nyob rau hauv ib daim ntawv txog 4 cm txoj kab uas hla. Ntawm daim ntawv thib ob, sau ib tsab ntawv siab 2.5 cm.
- Kaw cov ntawv nrog cov tsiaj ntawv ntawm phab ntsa ntawm qib uas nyob ntawm qhov muag. Ntsuas qhov nrug kom deb li 3 meters.
- Sawv ntsug 3 meters deb ntawm cov tsiaj ntawv ntawm phab ntsa. Tuav daim ntawv perforated nrog ob txhais tes nthuav tawm mus rau tom ntej. Koj ob txhais tes yuav tsum sib luag rau hauv pem teb.
- Saib cov tsiaj ntawv ntawm phab ntsa dhau ntawm lub qhov hauv daim ntawv. Thaum koj pom cov tsiaj ntawv, muaj phooj ywg npog ib lub qhov muag ua ntej, tom qab ntawd lwm tus. Tsis txhob txav lossis hloov chaw. Qhov muag uas tuaj yeem pom tsab ntawv yog koj lub qhov muag tseem ceeb. Yog tias koj tuaj yeem pom nrog ob lub qhov muag, tsis muaj lub qhov muag tseem ceeb hauv qhov kev xeem no.
Kauj Ruam 3. Ua qhov "Hole in Card - Close Range" test
Qhov kev ntsuas no zoo ib yam li Lub Qhov Hauv Daim Npav - Kev ntsuas nrug, tab sis kev ntsuas qhov muag uas koj siv thaum tsom mus rau qhov ze. Koj tseem tuaj yeem ua nws sai thiab yooj yim siv cov khoom hauv tsev.
- Qhov kev xeem no tuaj yeem ua tiav siv thimble, rab phom, lossis cov khoom zoo sib xws hauv tsev. Sau ib tsab ntawv 4 hli siab thiab dav rau ntawm ib daim ntawv. Muab cov ntawv no tso rau sab hauv qab ntawm thimble/qhov.
- Npog lub thimble/qhov nrog daim ntawv lossis daim nyias nyias ntawm txhuas. Siv cov roj hmab lossis daim kab xev los txuas rau nws. Ua qhov me me 4 hli hauv daim ntawv lossis ntawv txhuas. Lub qhov yuav tsum ncaj qha rau ntawm tsab ntawv, yog li thaum koj ntsia los ntawm lub qhov, koj yuav pom tsab ntawv.
- Muab tus thimble/qhov tso rau ntawm lub rooj thiab saib qis kom koj tuaj yeem pom cov tsiaj ntawv. Tsis txhob kov lub thimble/txhaj tshuaj lossis nias koj lub qhov muag ntawm lub qhov. Koj lub taub hau yuav tsum yog 30 - 60 cm.
- Tsis txhob txav koj lub taub hau thaum koj pom cov tsiaj ntawv. Muaj phooj ywg kaw ib lub qhov muag, tom qab ntawd lwm tus. Qhov muag uas tuaj yeem pom cov tsiaj ntawv yog lub qhov muag tseem ceeb. Yog tias ob lub qhov muag tuaj yeem pom cov tsiaj ntawv kom meej thaum ib qho ntawm lawv raug kaw, koj tsis muaj lub qhov muag tseem ceeb rau qhov kev xeem no.
Kauj Ruam 4. Ua qhov kev ntsuas sib tshuam (tsom mus rau ib lub ntsiab lus)
Qhov kev xeem no ntsuas qhov muag twg yog qhov tseem ceeb nyob ze. Cov txiaj ntsig yuav txawv los ntawm cov txiaj ntsig ntawm lwm qhov kev sim.
- Coj tus kav. Sau ib tsab ntawv rau ntawm ib daim ntawv. Cov ntawv yuav tsum yog 4 hli siab thiab dav. Kaw cov ntawv mus rau tus pas ntsuas kom lawv tsis hloov txoj haujlwm.
- Tuav tus pas ntsuas ntawm koj ob txhais tes. Cov ntawv yuav tsum nyob ntawm qhov muag. Tsom ntsoov rau cov tsiaj ntawv. Maj mam, nrog ob txhais tes, swb tus pas ntsuas ncaj nraim mus rau lub qhov ntswg.
- Nres thaum ib lub qhov muag tsis tuaj yeem tsom mus rau tsab ntawv. Qhov ntawd yog lub qhov muag tsis tseem ceeb ntawm qhov kev xeem no. Yog tias ob lub qhov muag tseem tsom mus txog thaum tus thawj coj kov lub qhov ntswg, tsis muaj qhov muag tseem ceeb hauv qhov kev xeem no.
Txoj Kev 2 ntawm 2: Siv Cov Ntaub Ntawv
Kauj Ruam 1. Txhim kho koj cov txuj ci
Yog tias koj ua kis las tshwj xeeb lossis muaj kev nyiam ua uas ua rau koj vam khom rau ib lub qhov muag xwb, txiav txim siab siv lub qhov muag tseem ceeb. Tab sis nco ntsoov, qhov muag tseem ceeb tuaj yeem sib txawv nyob ntawm qhov deb. Yog li ua kom ntseeg tau tias koj txiav txim siab qhov tseem ceeb tshaj plaws qhov muag ntsuas qhov tshwm sim, tom qab ntawd siv lub qhov muag hloov qhov muag tsis pom kev. Koj lub qhov muag tseem ceeb tuaj yeem yog sab nraud ntawm koj txhais tes lossis ko taw tseem ceeb. Cov dej num uas ua rau koj yuav tsum tso siab rau ib lub qhov muag suav nrog:
- Aim nrog rab phom
- Hneev taw
- Tsom ntsoov rau ib qho khoom ntawm lub koob yees duab uas tsis muaj lub vijtsam saib ua ntej loj
- Pom nrog lub tsom iav raj lossis tsom iav
Kauj Ruam 2. Tham nrog cov ntaub ntawv no nrog koj tus kws kho qhov muag
Paub txog lub qhov muag tseem ceeb no tshwj xeeb tshaj yog rau cov neeg uas hnav cov tsom iav qhov muag (kho qhov muag, ib qho rau qhov ze thiab ib qho rau qhov ntev). Yog tias koj tus kws kho mob sau ntawv tsom iav qhov muag, nws lossis nws yuav yuav sim koj qhov muag qhov tseem ceeb ib yam. Muaj ob hom lens monovision:
- Monovision contact lenses. Cov neeg uas hnav cov tsom iav tiv thaiv kab mob muaj daim ntawv yuav tshuaj rau qhov pom kev deb ntawm lawv lub qhov muag thiab lub lens rau nyeem hauv lub qhov muag uas tsis yog tus tseem ceeb.
- Kev Hloov Kho Monovision. Tus neeg siv hnav lub ntsej muag bifocal lossis multifocal nyob rau hauv lub qhov muag tsis tseem ceeb thiab lub lens kom pom kev deb nyob hauv lub qhov muag tseem ceeb.
Kauj Ruam 3. Nug koj tus kws kho qhov muag txog kev tawm dag zog los txhawb koj lub qhov muag
Yog tias koj xav tias ib lub qhov muag tsis muaj zog, koj tuaj yeem muaj peev xwm ntxiv dag zog nws los ntawm kev ua ib ce. Tab sis nco ntsoov sab laj nrog kws kho mob ua ntej pib ua ib ce kom tsis txhob mob qhov muag. Koj tus kws kho mob yuav pom zoo:
- Kev sib koom ua ke. Hauv qhov kev tawm dag zog no, xaub tus pas ntsuas lossis tus cwj mem maj mam tig mus rau koj lub qhov ntswg. Thaum cov khoom pib zoo li ob npaug, nres thiab rov tsom mus txog thaum cov khoom zoo li rov los ua ke dua. Yog tias tsim nyog, txav tus cwj mem tawm me ntsis thiab sim dua.
- Xyaum tsom koj lub qhov muag tsis tseem ceeb nyob ze ntawm kev nyeem ntawv nrug, tom qab ntawd txav nws mus. Nug koj tus kws kho mob ntev npaum li cas koj xav tau kom tswj xyuas cov ntsiab lus sib txawv. Tom qab ntawd kaw koj ob lub qhov muag kom so lawv ib pliag.
