Ngokwezibalo zeWorld Health Organisation (WHO), inani labantu abanesifo se-myopia liphezulu kakhulu.enkulu kakhuluphakathi kwabantu abanamehlo angaphantsi kwempilo, kunyeibefikelelaed2.6 yeebhiliyoni ngo-2020. I-Myopia ibe yingxaki enkulu kwihlabathi liphela, ingakumbi enzulue-Asia. Izinga le-myopia eTshayina liyi-47.1%, phantse isiqingatha sabantu bonke.Kuthetha ukuba enyekubantu ababini kukho umntu obona izinto ezikufutshane.
Izinga le-Myopia kumazwe ahlukeneyo
Kule mihla,kunyeukwanda okukhulu kwesantya se-myopia, izinga leukunxibaIiglasi nazo ziyanda unyaka nonyaka.Njengomnye wabaisifo sengqondo esingapheliyoizigulane, handive wenaingqalelo kule ntosloo ntophelisaumgangatho welensi xa ucingailisouyilo lokunxiba kunye nomsebenzi welensi?
Masifunde into ethileubalulekileyomalunga iizinto zelensi kunye nesalathisi sokuqaqambisa.
Ilensi elungileyo ifuna ukufana,uthumelokunye nokucaca.TEyona lens ixhaphakileyo namhlanje yimiphumo yeminyaka yophando.
| Uphuhliso lwezinto zelensi Uninzi lweelensi zokuqala zenziwe ngesandla ngezinto zendalo ezifana ne-quartz kunye nekristale. Ngophuhliso lwemveliso yeglasi kunye netekhnoloji yemizi-mveliso, izinto zendalo zatshintshwa ngokukhawuleza yiglasi ye-optical eyaqala ukubonelela ngemisebenzi emininzi. Ukususela ngeminyaka yoo-1960 ukuya kweyoo-1980, izinto ze-resin, ezenziwe nge-petroleum, ziye zatshintsha iglasi ngenxa yeempawu zayo zokukhanya ezingcono, ukucubungula okukhuselekileyo kunye neempawu zomzimba ezincinci, kwaye zaba zezona zinto ziphambili kwiilensi zeglasi yamehlo kude kube ngoku. |
Njengezona zinto zidumileyo zeelensi kwimarike, izinto zeresin zimelwe ikakhulu yi-CR-39 resin eyenziwe yi-PPG, i-MR resin eyenziwe yi-Mitsui,kwayeI-resin ye-KR eyenziwe yi-KOC, Korea, njl.
Izinto zelensi zimisela isalathisi sokuqaqamba kwelensi. Isalathisi sokuqaqamba kwelensi ngumlinganiselo wesantya sokusasazeka kokukhanya kwi-vacuum ukuya kwisantya sokusasazeka kokukhanya kwizinto zelensi, nto leyo ebonisa amandla okuqaqamba kwelensi ekukhanyeni. Ngokubanzi, okukhona isalathisi sokuqaqamba kwelensi siphezulu, kokukhona ilensi incipha.
Ngoku,I-Universe Opticaline-refractive index ye-1.50, 1.53, 1.56, 1.60, 1.67, 1.74 kunye nezinyeizalathisi zeIilensi. Ngokuphathelele izixhobo, sigcine intsebenziswano esondeleyo nePPG yase-United States kunye neMitsui Chemical yaseJapan.njengoezinye iinkampani zezinto ezisetyenzisiweyo eziphumelele kakhulu.
CRIzinto eziluhlaza ezingama-39 ezithengwe kwi-PPG, e-USA, zisetyenziselwa ukwenza ilensi ye-refractive index 1.50.Ithandwa ngakumbi kwimarike bngenxa ye-Abbe coefficient yayo ephezulu, ukusebenza kakuhle kwe-optical, ukusebenza kokhuselekokwayeengabizi kakhulu.
Ilensi ye-1.53 refractive index ithathwe kwizinto ezikhethekileyo, iTrivex, nayo evela kwi-PPG e-US. Izinto zelensi zeTrivex ziyakwazi ukumelana nokuchaphazeleka kakhulu. Ngenxa yokuba zikhaphukhaphu kuneelensi eziqhelekileyo, iilensi zeTrivex zilula kakhulu.kakuhle kakhuluukhetho lwezihlangu zamehlo zabantwana, izihlangu zamehlo ezingenamiphetho, iiglasi zemidlalo, izihlangu zamehlo zokhuseleko, kunye nezihlangu zamehlo zemidlalo.
Neuphuhliso oIiglasi ze-f, "ilensi", njengesixhobo esiphambili seglasi, zihlala zivelisa izinto ezintsha kwaye ziphucuka ngokutshintsha kwamaxesha.Indalo yonkeI-Optical 1.60, 1.67, 1.74phezuluisalathisiIzinto zokwenza iilensi zenziwe ngothotho lwe-MR lweMitsui ChemicalUthotho lwe-MRzizixhobo ezikumgangatho ophezulu neziphucukileyo, ezine-refractive index ephezulu, inombolo ephezulu ye-Abbe, umxhuzulane ophantsi, ukumelana nempembelelo ephezulu kunye nezinye izibonelelo.
Ukuphuculwa okuqhubekayo kwezinto zelensiUphando noPhuhlisokunye netekhnolojinyusaimveliso yelensisqalisa izinto ezintshai-ionIzinto zokwenza iilensimiselauzinzoyomgangatho, ukudluliselwa, ukucaca kunye nesiphumo sokubona.
Indalo yonkeI-optical ibilandela umgaqo-nkqubo wentsebenziswano yokuphumelela kwababini kunye nempumelelo efanayoThinamamela ilizwi labathengi,yaziumthengis'iimfuno, nika ingqalelo kwimarikeumkhwa, njengeukudala umbono ocacileyo.