Ngokusho kwezibalo ze-World Health Organization (WHO), inani labantu abaphethwe yi-myopia liphezulu kakhulu.enkulu kunazo zonkephakathi kwabantu abanamehlo angaphansi kwempilo, kanyeineukufinyelelaed2.6 billion ngo-2020. I-Myopia isibe yinkinga enkulu emhlabeni jikelele, ikakhulukazi okungathi sínae-Asia. Izinga le-myopia eShayina lingu-47.1%, cishe ingxenye yabantu bonke.Kusho eyodwakubantu ababili kukhona ukubona okuseduze.
Izinga le-Myopia emazweni ahlukene
Namuhla,ngeukwanda okukhulu kwesilinganiso se-myopia, izinga le-ukugqokaIzibuko nazo ziyanda unyaka nonyaka.Njengomunye we-i-myopiciziguli, hangikutholilewanaka kakhulu isicislokhoqedaikhwalithi yelensi uma ucabangaisoumklamo wokugqoka kanye nomsebenzi welensi?
Ake sifunde okuthileimportanmayelana iizinto zelensi kanye nenkomba yokukhanya.
Ilensi enhle idinga ukufana,ukudluliselwakanye nokucaca. TIlensi evame kakhulu namuhla iwumphumela weminyaka eminingi yokuhlola.
| Ukuthuthukiswa kwezinto zelensi Iningi lamalensi okuqala lenziwa ngezandla ngezinto zemvelo ezifana ne-quartz ne-crystal. Ngokuthuthuka kokukhiqizwa kwengilazi kanye nobuchwepheshe bezimboni, izinto zemvelo zathathelwa indawo ngokushesha yingilazi ebonakalayo eyaqala ukunikeza imisebenzi eminingi. Kusukela ngawo-1960 kuya ko-1980, izinto ze-resin, ezenziwe nge-petroleum, ziye zathatha indawo yengilazi ngenxa yezakhiwo zayo zokukhanya ezingcono, ukucubungula okuphephile kanye nezakhiwo zomzimba ezincane, futhi zaba yizinto eziyinhloko zamalensi engilazi kuze kube manje. |
Njengezinto zelensi ezithandwa kakhulu emakethe, izinto zeresini zimelelwa kakhulu yi-resin ye-CR-39 eyenziwe yi-PPG, i-resin ye-MR eyenziwe yi-Mitsui,futhiI-resin ye-KR eyenziwe yi-KOC, Korea, njll.
Izinto zelensi zinquma inkomba yokukhanya kwelensi. Inkomba yokukhanya kwelensi iyisilinganiso sejubane lokusabalala kokukhanya ku-vacuum kuya kujubane lokusabalala kokukhanya ezintweni zelensi, okubonisa ikhono lokukhanya kwelensi ekukhanyeni. Ngokuvamile, lapho inkomba yokukhanya kwelensi iphakeme, ilensi iba ncane kakhulu.
Okwamanje,I-Universe Opticalinenkomba yokubuyisa engu-1.50, 1.53, 1.56, 1.60, 1.67, 1.74 kanye nezinyeizinkomba zeAmalensi. Ngokuphathelene nezinto zokwakha, silondoloze ukubambisana okuqinile ne-PPG yase-United States kanye ne-Mitsui Chemical yaseJapan.kanye neezinye izinkampani zezinto zokusetshenziswa eziphumelele kakhulu.
CRIzinto zokusetshenziswa ezingama-39 ezithengwe kwa-PPG, e-USA, zisetshenziselwa ukwenza ilensi ye-refractive index 1.50.Kuthandwa kakhulu emakethe bngenxa ye-Abbe coefficient yayo ephezulu, ukusebenza okuhle kakhulu kokukhanya, ukusebenza kokuphephafuthiengabizi kakhulu.
Ilensi ye-refractive index engu-1.53 ithathwe ezintweni ezikhethekile, i-Trivex, nayo evela ku-PPG e-US. Izinto zelensi ye-Trivex zimelana kakhulu nokushayisana. Ngenxa yokuthi zilula kunelensi ezijwayelekile, amalensi e-Trivex alula.kuhle kakhuluukukhetha kwezingubo zamehlo zezingane, izibuko zamehlo ezingenama-rim, izibuko zezemidlalo, izibuko zamehlo zokuphepha, kanye nezibuko zamehlo zemidlalo.
Kanye neukuthuthukiswa oIzibuko ze-f, "ilensi", njengesengezo esiyinhloko sezibuko, ihlala isungula izinto ezintsha futhi ithuthukiswa ngokushintsha kwezikhathi.Indalo yonkeI-Optical 1.60, 1.67, 1.74phezuluinkombaIzinto zokusetshenziswa zelensi zenziwe ngochungechunge lwe-MR lwe-Mitsui Chemical. Uchungechunge lwe-MRziyizinto ezisezingeni eliphezulu nezithuthukisiwe, ezinenkomba ephezulu yokubuka, inombolo ephezulu ye-Abbe, amandla adonsela phansi aphansi, ukumelana okuphezulu komthelela kanye nezinye izinzuzo.
Ukuthuthukiswa okuqhubekayo kwezinto zelensiI-R&Dkanye nobuchwepheshethuthukisaumkhiqizo welensissungula izinto ezintshai-ionIzinto zokusetshenziswa zelensinqumaukuzinzayekhwalithi, ukudluliselwa, ukucaca kanye nomphumela obonakalayo.
Indalo yonkei-optical ibilokhu ilandela inqubomgomo yokubambisana okuzuzayo nokufeza impumelelo efanayoThinalalela izwi lamakhasimende,Funa ukwaziikhasimendes'izidingo, naka imaketheukuthambekela, Ngakho keukudala umbono ocacile.