Malinga ndi ziwerengero za World Health Organization (WHO), chiwerengero cha anthu omwe ali ndi matenda a myopia chilichachikulu kwambiripakati pa anthu omwe ali ndi maso osalimba, komansoili ndikufikiraed2.6 biliyoni mu 2020. Matenda a myopia akhala vuto lalikulu padziko lonse lapansi, makamaka zowopsaku Asia. Chiŵerengero cha anthu odwala matenda a myopia ku China ndi 47.1%, pafupifupi theka la anthu onse.Zimatanthauza chimodzimwa anthu awiri aliwonse ali ndi vuto losaona pafupi.
Chiwerengero cha Myopia m'mayiko osiyanasiyana
Masiku ano,ndikuchuluka kwakukulu kwa myopia,kuvalamagalasi akuwonjezekanso chaka ndi chaka.Monga m'modzi mwamatenda a myopicodwala, handiweanasamala kwambiri za chinthuchoskuti dethetsakhalidwe la lenzi poganiziradisokapangidwe ka zovala ndi ntchito ya lenzi?
Tiyeni tiphunzirepo kanthuimportanza azinthu za lens ndi refractive index.
Lenzi yabwino imafuna kufanana,kutumizandi kumveka bwino. TLens yodziwika kwambiri masiku ano ndi zotsatira za zaka zambiri zofufuza.
| Kupanga zinthu za lens Magalasi ambiri oyambirira anapangidwa ndi manja ndi zinthu zachilengedwe monga quartz ndi kristalo. Ndi chitukuko cha kupanga magalasi ndi ukadaulo wamafakitale, zinthu zachilengedwe zinasinthidwa mwachangu ndi magalasi owoneka bwino omwe anayamba kupereka ntchito zambiri. Kuyambira m'ma 1960 mpaka m'ma 1980, zinthu zopangidwa ndi utomoni, zopangidwa ndi mafuta, zasintha magalasi chifukwa cha mawonekedwe ake abwino, kukonza bwino komanso mawonekedwe ake owonda, ndipo zakhala zinthu zazikulu zomwe zimagwiritsidwa ntchito popanga magalasi a maso mpaka pano. |
Monga zinthu zodziwika kwambiri za lenzi pamsika, zinthu za utomoni zimayimiridwa makamaka ndi utomoni wa CR-39 wopangidwa ndi PPG, utomoni wa MR wopangidwa ndi Mitsui,ndiUtomoni wa KR wopangidwa ndi KOC, Korea, ndi zina zotero.
Zipangizo za lenzi zimatsimikiza kuchuluka kwa kuwala komwe kumaonekera mu lenzi. Chizindikiro cha kuwala komwe kumaonekera mu lenzi ndi chiŵerengero cha liwiro la kuwala komwe kumaonekera mu vacuum ndi liwiro la kuwala komwe kumaonekera mu lenzi, zomwe zimasonyeza mphamvu ya kuwala komwe kumaonekera mu lenzi. Kawirikawiri, chizindikiro cha kuwala komwe kumaonekera mu lenzi chikakhala chachikulu, lenziyo imachepa.
Pakadali pano,Chilengedwe Chowonekaili ndi refractive index ya 1.50, 1.53, 1.56, 1.60, 1.67, 1.74 ndi zinazizindikiro zaMagalasi. Ponena za zipangizo, takhala tikugwirizana kwambiri ndi PPG ya ku United States ndi Mitsui Chemical ya ku Japan.komansomakampani ena opanga zinthu zopangira zinthu zomwe achita bwino kwambiri.
CR-39 zinthu zopangira zomwe zagulidwa ku PPG, USA, zimagwiritsidwa ntchito popanga lenzi ya refractive index 1.50.Ndi yokondedwa kwambiri pamsika bchifukwa cha kuchuluka kwake kwakukulu kwa Abbe, magwiridwe antchito abwino kwambiri, komanso magwiridwe antchito otetezekandiyotsika mtengo kwambiri.
Lenzi ya 1.53 refractive index imachokera ku chinthu chapadera, Trivex, chomwe chimachokeranso ku PPG ku US. Lenzi ya Trivex ndi yolimba kwambiri. Chifukwa ndi yopepuka kuposa magalasi wamba, magalasi a Trivex ndi opepuka.zabwino kwambiriZosankha za ana, magalasi opanda mkombero, magalasi amasewera, magalasi oteteza maso, ndi magalasi amasewera.
Ndichitukuko oMagalasi a f, "lens", monga chowonjezera chachikulu cha magalasi, nthawi zonse amasintha ndikusintha malinga ndi kusintha kwa nthawi.ChilengedweKuwala 1.60, 1.67, 1.74okwerachizindikiritsoZipangizo zopangira ma lens zimapangidwa ndi MR series ya Mitsui ChemicalMndandanda wa MRndi zipangizo zapamwamba komanso zapamwamba, zokhala ndi refractive index yapamwamba, nambala yayikulu ya Abbe, mphamvu yokoka yochepa, kukana kwakukulu kwa zotsatira ndi zabwino zina.
Kupititsa patsogolo kosalekeza kwa zinthu za lensKafukufuku ndi Kukonzansondi ukadaulolimbitsanichinthu cha mandalaspanga zinthu zatsopanoayoniZipangizo zopangira magalasidziwanikukhazikikayaubwino, kufalitsa, kuwonekera bwino komanso zotsatira zowoneka bwino.
ChilengedweOptical yakhala ikutsatira mfundo za mgwirizano wopindulitsa aliyense komanso kukwaniritsa zonseIfemvetserani mawu a makasitomala,Dziwanikasitomalas'zosowa zanu, samalani ndi msikachizolowezi, kotero kutikuti apange masomphenya omveka bwino.