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yintoni ilensi eqhubelekayo? Iilensi eziqhubelekayo luhlobo lwelensi zeglasi ezibonelela ukuqhubela phambili okugudileyo nokungenamthungo kwamagunya amaninzi okulungisa umbono ngaphakathi kwilensi enye.Zikwabizwa ngokuba yi-no-line bifocals okanye iilensi ze-varifocal.Ngokungafaniyo nemveli...Funda ngokugqithisileyo»
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Yintoni ukukhanya okuluhlaza?Ubude bokukhanya okubonakalayo yi-380-780NM, kwaye ukukhanya okuluhlaza okwesibhakabhaka yi-380-50NM, enye yezona zifutshane kunye namandla aphezulu.Ingaba ukukhanya okuluhlaza kukho phi?Ukukhanya okuluhlaza kukho kwizinto ezininzi abantu...Funda ngokugqithisileyo»
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1. Ngubani ofanelekileyo kwiilensi ezininzi eziqhubekayo?Ilungele uhlengahlengiso lokuncipha, kwangaxeshanye ukubona kude, fancy okanye ngaxeshanye ukubona kude kufuphi iimfuno ezahlukeneyo zabantu (ingakumbi ukubona ikhompyuter kunye neemfuno zefowuni ephathwayo), akufuneki ...Funda ngokugqithisileyo»
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Abantu bahlala bebuza ukuba ngaba kufuneka banxibe iperi yeglasi ezibhlowu eziblowu ukukhusela amehlo abo xa bejonge kwikhompyuter, ipad okanye ifowuni ephathwayo.Ngaba i-myopia laser ichanekile emva kotyando kufuneka inxibe iiglasi ze-anti blue ray ukukhusela iliso?Ukuphendula ezi q...Funda ngokugqithisileyo»
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Iilensi eziqhubela phambili, ezibhekiselele kwiilensi ezigxile kwizinto ezininzi, zinxitywa kakhulu eYurophu nase-United States, kodwa ziye zaduma eTshayina kule minyaka ili-10 idlulileyo.Makhe sijonge umfanekiso weeglasi ezininzi eziqhubekayo.Namhlanje, abaninzi ...Funda ngokugqithisileyo»
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Izinga lokuthandwa kweefilimu eziqhubekayo kwimimandla ephuhlisiwe njengeYurophu kunye ne-United States idlule i-70%, kwaye iifilimu eziqhubekayo zithatha i-30% yevolumu yokuthengisa, kunye neentengiso zonyaka malunga ne-500 yezigidi.Nangona kunjalo, iifilimu eziqhubela phambili zingaphantsi kwe-3% ezidumileyo kwi ...Funda ngokugqithisileyo»
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Izinto ezintathu eziphambili zeelensi zamehlo: zeziphi iiyantlukwano ezithile kunye neenzuzo kunye nokungalunganga kweelensi ezintathu ezithandwayo zamehlo.Ukufaka iiglasi zolwazi lwelensi, sazisa uhlobo lomsebenzi welensi, ubunjani bemathiriyeli kancinane...Funda ngokugqithisileyo»
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Igalaji yesiko lens ekubhekiswa kuyo njengeqhekeza legaraji, iseti yemveliso.Igalaji eyenziwe ngokwezifiso i-lens ibhekisela kwimveliso engenakukwazi ukuhlangabezana nokunikezelwa kweziqwenga ezikhoyo kwaye isetyenziselwa ukuhlangabezana neemfuno ezizodwa.Olu hlobo lwelensi lwahlukile kwilensi eqhelekileyo yesiqhelo, ethi...Funda ngokugqithisileyo»
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Iilensi zokutshintsha umbala ziya zithandwa kakhulu ngenxa yokuba aziboneleli kuphela ukukhuselwa kwe-UV, kodwa zifanelekile ukugqoka imihla ngemihla.Eyona ngongoma ibalulekileyo kukuhlangabezana neemfuno zamaqela ahlukeneyo abantu, njenge-presbyopia, i-myopia, ukukhanya okucaba njalo njalo.Ngoko, h...Funda ngokugqithisileyo»
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Ukukhethwa kwe-lens kunokuqwalaselwa kwiinkalo ezintathu: izinto eziphathekayo, umsebenzi kunye nesalathisi se-refractive.imathiriyeli Izinto eziqhelekileyo zezi: iilensi zeglasi, iilensi ze-resin kunye ne-PC Iingcebiso: ABANTWANA abasebenzayo, ukusuka kwingqwalasela yokhuseleko, ukhetho olungcono lweelensi ze-resin okanye iilensi zePC...Funda ngokugqithisileyo»
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Ngokuphuculwa okuqhubekayo kweemfuno zomgangatho wabathengi, iimfuno zomgangatho wabantu kwiilensi zamehlo nazo ziphuculwa ngokuthe ngcembe, kwangaxeshanye, iimfuno zehlabathi zeelensi zamehlo nazo ziya ziba ngqongqo ngakumbi.Uchonga njani umgangatho walo ...Funda ngokugqithisileyo»