Ngaba ucinga ukuzama ii-lens zokuxhumana? Ngezo zonke iinketho ezifanelekileyo kunye ezifanelekileyo ezikhoyo namhlanje, phantse nabani na onokugqoka oonxibelelwano. Abanye abantu bafumanisa ukuba ukugqithana nabafowunelwa kubhetele ekusebenzeni kwabo, ngelixa abanye bafumana banobunzima kwaye banandipha lula ngokugqoka izibuko. Ngoxa ukugqoka ii-lens zokudibanisa kuyindlela ekhethekileyo kwabanye abantu, akunakusebenza kwabanye.
Ziziphi iiLensi zoLwazi?
I-lens zoqhagamshelwano zincinci zincinci zeplastiki zigugu ngqo kwijiso ukulungisa iingxaki ezithile zembono. Abafownelwa bayisisombululo sokulungisa esipheleleyo kulabo abafuni ukugqoka amaglasi kunye / okanye ukulungiswa kocwangco. Izigidi zabantu zibambisa oonxibelelwano, ngakumbi abo bahola indlela yokuphila ekhutheleyo kwaye bafuna ukucima, umbono ocacileyo ngaphandle kokugcina iiglasi ezibukweni. Uninzi lwabantu luyakwazi ukugqoka ii-lens kunye nokuzonwabisa inkululeko yokukwazi ukubona ngaphandle koluncedo lweziglasi.
Iimviwo zoNxibelelwano
Ukuba unomdla ekugqibeni oonxibelelwano, isinyathelo sokuqala kukuba novavanyo lensibano yoqhagamshelwano ngugqirha weziliso. Uvavanyo lwe- lens loqhagamshelwano lusetyenziselwa ngokuthe ngqo ukulungelelana nabo kunye nabo. Ukuba uceba ukuba ne-lens test, qwalasela ukuhlolwa okungaphezulu kunokuba ungasetyenziswa. Olu hlobo lovavanyo luyinyani kwaye luquka amanyathelo athile.
Ngethuba lovavanyo lensenti yakho yomnxeba uya kuqala ukujonga ukuba amehlo akho anempilo ngokwaneleyo ukuba agqoke oonxibelelwano. Ekubeni oonxibelelwano banamathele kwaye bagubungele amehlo, amehlo akho kufuneka abe nempilo enokwenzeka ngaphambi kokuba uzame ukuwagqoka. Amehlo akho aya kubalwa. Ugqirha lakho kwamehlo liya kuzama nzima ukufumana imilinganiselo echanekileyo kunokwenzeka.
Ezi zilinganiso ezichanekileyo ziza kunceda utyando ukuba afumane oonxibelelwano olufanelekileyo ukuba alungele kakuhle kwaye ukhululeke emehlweni akho. Ukuba unomtsha ukugqoka oonxibelelwano , ugqirha uya kukufundisa indlela yokufaka kunye nokususa oonxibelelwano emehlweni akho. Uya kukunceda usebenzise kwaye usetyenziswe ukubeka iilensi zokudibanisa kunye nokuzikhupha wena. Uya kuthi ufundiswe indlela yokunyamekela ngokufanelekileyo, kuquka ukucoca nokugcina.
Iintlobo zonxibelelwano
Kukho amaqela amabini amakhulu oonxibelelwano: oonxibelelwano olucothayo kunye negesi enamandla eqhagamshelana nabo. Oonxibelelwano abaphantsi baxakeke kakhulu kwaye bakhululekile ukugqoka. Zenziwe ngokubanzi ngamanzi, kungenxa yoko zizithambile. Oonxibelelwano abaphantsi bahlukaniswe ngamacandelo amane asezantsi: oomnxeba (oqhelekileyo) oonxibelelwano lensisi, oonxibelelwano lwe- astigmatism, oonxibelelwano be- presbyopia, kunye nombala (izityu) oonxibelelwano. I-gas engapheliyo i-lens yokuxhamla i-lens yenziwe ngeprojekthi eplastiki enzima eyenza i-crisp, imbonakalo ecacileyo kwaye ilungisa iingxaki zombono. Zihlala zihlala zihlala zihlala zide kwaye zihlala zide kunokuba zithintele iilensi zokudibanisa.
Ukugqoka kunye neeShedyuli zoNxibelelwano zoNxibelelwano
Abanye oonxibelelwano benzelwe ukunyuka kwansuku zonke. Unxibelelwano oludityanisiweyo lwemihla ngemihla lugqoke olunye usuku kwaye lulahlwe. Ezinye iilensi ezithambileyo kunye nezinye iilensi ze-RGP zigqithiselwe usuku kwaye zisuswe, zicocwe kwaye zihluthwe ngo-night ebusuku.
Iilensi eziphantsi zihlala zihlala endaweni rhoqo. Iilensi ze-RGP zinokuhlala iminyaka ngokunyamekela. Ukwandisa iilensi ezigxibileyo zigugile ngobusuku obuveki kwaye zitshintshwe. Ukugqithisa kwe-nightight kunciphisa umlinganiselo we-oksijini okhoyo kwiso kwaye kwandisa amathuba okusuleleka. Ngenxa yoko, abanye abaphandi abacebisi ukunxiba kwandiswa kweelensi .
ILizwi
Ugqirha lakho kwamehlo liya kukubonisa indlela yokuhlambulula kunye nokutshatyalaliswa kwezifowuni. Sebenzisa iimveliso zokunakekelwa kwelensi yemveliso kwaye uhlambulule iilensi rhoqo kangangoko kunokwenzeka ukususa i-brukta. Qaphela ukuba ukugqoka ii-lens zoqhagamshelwano ixesha elide kunokuba yingozi.
Ukugqithisa ngaphezulu kunokubangela iingxaki, ezifana nombono onqabileyo, intlungu kunye nokubomvu ngenxa yokungabikho kwomoya okwi-oksijini. Khumbula ukuba ii-lens zoqhagamshelwano zizixhobo zonyango kufuneka zithathwe ngokungathí sina. Ngokunyamekela, kunjalo, uza kubona bhetele kwaye uya kuba noxolo lwengqondo ukwazi ukuba oonxibelelwano bakho banempilo kwaye balondekile kwamehlo akho.
Umthombo:
UTom Nugent, u-Staywell Custom Communications. "Musa ukuyeka iComputer yakho yoLwazi lokuCoca." Dec.2005 VSP.com