Zvinoenderana nefungidziro yeWorld Health Organization (WHO), huwandu hwevanhu vane chirwere chemyopia hurichikurupakati pevanhu vane maziso asina hutano, uyeinekusvikaed2.6 bhiriyoni muna 2020. Myopia yave dambudziko guru pasi rose, zvakanyanya zvakakombamuAsia. Huwandu hwevanhu vane myopia muChina huri pa47.1%, inenge hafu yevanhu vose.Zvinoreva chimwepavanhu vaviri vega vega, munhu anoona zviri pedyo.
Mwero weMyopia Munyika Dzakasiyana
Mazuva ano,nekuwedzera kukuru kwehuwandu hwe myopia, huwandu hwekupfekamagirazi ari kuwedzerawo gore negore.Semumwe wemyopiavarwere, haiweakateerera chinhu ichisizvo degumisamhando ye lenzi kana uchitarisazisodhizaini yekupfeka uye mashandiro e lenzi?
Ngatidzidzei chimwe chinhukukoshanezve iyozvinhu zve lenzi uye refractive index.
Lenzi yakanaka inoda kufanana,kutumirauye kujeka. TLenzi inonyanya kushandiswa mazuva ano imhaka yemakore ekutsvaga.
| Kugadzirwa kwezvinhu zve lens Mazhinji emalenzi ekutanga akagadzirwa nemaoko nezvinhu zvechisikigo zvakaita se quartz ne crystal. Nekuvandudzwa kwekugadzirwa kwegirazi uye tekinoroji yeindasitiri, zvinhu zvechisikigo zvakatsiviwa nekukurumidza negirazi re optical iro rakatanga kupa mabasa akawanda. Kubva kuma1960 kusvika kuma1980, zvinhu zve resin, zvakagadzirwa ne petroleum, zvakatsiva girazi nekuda kwehunhu hwaro huri nani hwe optical, kugadziriswa kwakachengeteka uye hunhu hwakatetepa hwemuviri, uye zvave chinhu chikuru chemalenzi egirazi remaziso kusvika pari zvino. |
Sezvinhu zvinonyanya kufarirwa nerenzi pamusika, zvinhu zveresin zvinonyanya kumiririrwa neCR-39 resin yakagadzirwa nePPG, MR resin yakagadzirwa naMitsui,uyeKR resin yakagadzirwa neKOC, Korea, nezvimwewo.
Zvinhu zvelenzi zvinosarudza refractive index yelenzi. Lenzi refractive index inhamba yekumhanya kwekupararira kwechiedza mu vacuum kusvika light propagation speed mulenzi, zvichiratidza kugona kwerenzi kuchiedza. Kazhinji, refractive index yelenzi yakakwira, lenzi inotetepawo.
Parizvino,Zvepasi Poseine refractive index ye1.50, 1.53, 1.56, 1.60, 1.67, 1.74 nedzimwema indekisi emagirazi. Panyaya yezvinhu, takaramba tichishanda pamwe chete nePPG yeUnited States neMitsui Chemical yeJapan.naizvozvowomamwe makambani ezvigadzirwa zvekugadzira zvinhu ane kubudirira kukuru.
CR-39 zvinhu zvakabikwa zvakatengwa kubva kuPPG, USA, zvinoshandiswa kugadzira refractive index 1.50 lens.Zvinonyanya kufarirwa mumusika bnekuda kweAbbe coefficient yayo yakakwira, mashandiro akanaka ekuona, mashandiro ekuchengetedzauyeisingadhuri zvakanyanya.
Lenzi ye1.53 refractive index inotorwa kubva kune chinhu chakakosha, Trivex, zvakare kubva kuPPG muUS. Lenzi yeTrivex inodzivirira zvakanyanya kukuvadzwa. Nekuti yakareruka kupfuura malenzi akajairwa, malenzi eTrivex anobatsira zvikuru.kugona chosesarudzo yezvipfeko zvevana zvemaziso, zvipfeko zvisina muromo, magogorosi emitambo, zvipfeko zvekuchengetedza, uye zvipfeko zvemitambo.
Nebudiriro oMagirazi e-f, "lenzi", sechishongedzo chikuru chemagirazi, anogara achivandudza nekuchinja kwenguva.Nyika yoseOptical 1.60, 1.67, 1.74kukwiriraindekisiZvinhu zvakagadzirwa ne lens zvakagadzirwa ne MR series ye Mitsui Chemical. MR nhevedzanozvinhu zvemhando yepamusoro uye zvepamusoro, zvine indekisi yepamusoro yekupenya, nhamba yepamusoro yeAbbe, simba rakaderera, kuramba simba rakawanda uye zvimwe zvakanakira.
Kuvandudzwa kuri kuramba kuchiitwa kwezvinhu zve lenziR&Duye tekinorojisimbisachigadzirwa chelenzisgadzira zvinhu zvitsvaiyoniZvinhu zve lenzisarudzakugadzikanayemhando yepamusoro, kutapurirana, kujeka uye mhedzisiro yekuona.
Nyika yoseOptical yave ichitevedzera mutemo wekushandira pamwe kwevose uye kubudirira kweseIsuteererai inzwi revatengi,zivamutengis'zvinodiwa, teererai musikatsika, saka sekugadzira chiono chakajeka.