Ngokutsho koqikelelo lweWorld Health Organization (WHO), inani labantu abaphethwe yi-myopiaenkulu kakhuluphakathi kwabantu abanamehlo aphantsi, kunyeibeukufikelelaedI-2.6 yeebhiliyoni ngo-2020. I-Myopia ibe yingxaki enkulu yehlabathi, ingakumbi enzulueAsia.Izinga le-myopia e-China yi-47.1%, phantse isiqingatha sabemi bebonke.Lithetha enyekubo bonke abantu ababini babona kufutshane.
Inqanaba leMyopia kumazwe ahlukeneyo
Namhlanje,kunyeukwanda okubonakalayo kwizinga le-myopia, izingaukunxibaiiglasi nazo zikhula unyaka nonyaka.Njengenye yemyyopicizigulane, have wenawanikela ingqalelo kumbandelasukuba dephelisa iumgangatho welensi xa ucingailisoukunxiba uyilo kunye nomsebenzi welensi?
Masifunde intokubalulekilet malunga iimathiriyeli yelensi kunye nesalathiso se-refractive.
Ilensi elungileyo ifuna ukufana,ugqithisokunye nokucaca.Teyona lens ixhaphakileyo namhlanje sisiphumo seminyaka yokuhlola.
| Ukuphuhliswa kwezixhobo zelensi Uninzi lweelensi zokuqala zenziwa ngesandla ngezinto zendalo ezifana nequartz kunye nekristale.Ngokuphuhliswa kwemveliso yeglasi kunye nobuchwepheshe bezoshishino, izinto zendalo zatshintshwa ngokukhawuleza ngeglasi ye-optical eyaqala ukubonelela ngemisebenzi emininzi.Ukusukela ngeminyaka yoo-1960 ukuya koo-1980, izixhobo ze-resin, ezenziwe ngepetroleum, zithathe indawo yeglasi ukuze zibe ngcono, ukusetyenzwa ngokukhuselekileyo kunye neempawu ezibhityileyo zomzimba, kwaye zibe yeyona nto iphambili yeelensi zeglasi kude kube ngoku. |
Njengezona zinto zidumileyo zelensi kwimarike, izixhobo ze-resin zimelwe ikakhulu yi-CR-39 resin ephuhliswe yiPPG, i-MR resin ephuhliswe nguMitsui,kwayeI-resin ye-KR iphuhliswe yi-KOC, Korea, njl.
Isixhobo se-lens sinquma isalathiso se-refractive ye-lens.Isalathiso se-Lens refractive ngumlinganiselo wesantya sosasazo lokukhanya kwi-vacuum ukuya kwisantya sosasazo lokukhanya kwimathiriyeli yelensi, ebonisa isakhono sokuphinda sikhanye kwilensi.Ngokuqhelekileyo, i-index ye-refractive ye-lens iphezulu, iyancipha i-lens.
Ngoku,I-Universe Opticaline-refractive index ye-1.50, 1.53, 1.56, 1.60, 1.67, 1.74 kunye nezinyeIzalathisi zeiilensi.Ngokumalunga nemathiriyeli, siye sagcina intsebenziswano esondeleyo kunye nePPG yaseUnited States kunye neMitsui Chemical yaseJapan.njengoezinye iinkampani zemathiriyeli ekrwada ezinempumelelo ezigqwesileyo.
CR-I-39 impahla eluhlaza ethengwe kwi-PPG, eU.SA, isetyenziselwa ukwenza i-refractive index 1.50 lens.Ithandwa kakhulu kwimarike bngenxa ye-coefficient ye-Abbe ephezulu, ukusebenza kakuhle kwe-optical, ukusebenza kokhuselekokwayeingabizi kakhulu.
I-lens ye-refractive index ye-1.53 ivela kwizinto ezikhethekileyo, i-Trivex, nayo evela kwi-PPG e-US.I-Trivex lens imathiriyeli ayichaphazeli kakhulu.Ngenxa yokuba zikhaphukhaphu kuneelensi eziqhelekileyo, iilensi zeTrivex zinjalokakuhle kakhuluukhetho lweempahla zamehlo zabantwana, iimpahla zamehlo ezingenamsinga, iiglasi zemidlalo, iimpahla zamehlo zokhuseleko, kunye neempahla zamehlo zezemidlalo.
Neuphuhliso oiiglasi ze-f, "i-lens", njenge-accessory ephambili yeeglasi, ihlala ihlaziya kwaye iphucula ngokutshintsha kwamaxesha.Indalo iphelaI-Optical 1.60, 1.67, 1.74phezuluisalathisiIlensi izinto ekrwada zenziwe nge MR uthotho Mitsui Chemical.MR serieszikumgangatho ophezulu kunye nezixhobo eziphambili, kunye nesalathisi esiphezulu se-refractive, inombolo ye-Abbe ephezulu, ubunzima obuphantsi obuthile, ukuxhathisa impembelelo ephezulu kunye nezinye iingenelo.
Ukuphuculwa okuqhubekayo kwezinto zelensiI-R&Dkunye neteknolojinyusa iimveliso yelensisinto entshaion.Ilensi imathiriyeli ekrwadamisela iuzinzoyomgangatho, ukuhanjiswa, ukucaca kunye nempembelelo ebonakalayo.
Indalo iphelai-optical ibambelele kumgaqo-nkqubo wokuphumelela ngokubambisana kunye nempumelelo efanayo.Thinamamela ilizwi labathengi,yaziumthengis'iimfuno, ingqalelo kwimarikeutyekelo, njengeukwenza umbono ocacileyo.