Ho latela likhakanyo tsa Mokhatlo oa Lefatše oa Bophelo (WHO), palo ea batho ba nang le bothata ba ka bae kholo ka ho fetisisahar'a batho ba nang le mahlo a bophelo bo botle, lee na lefihlellaed2.6 Bilione ho 2020. Myopia e fetohile bothata bo boholo ba lefatše, ka ho tebileng haholoAsia. Tekanyetso ea myopia China ke 47.1%, hoo e ka bang halofo ea baahi bohle.Ho bolela e le 'ngoeHo batho ba babeli ba atamelaneng.
Lebelo la myopia linaheng tse fapaneng
Matsatsing ana,lekeketseho ea bohlokoa ea sekhahla sa myopia, tekanyo eaho roalalikhalase li boetse li eketseha selemo le selemo.E le e 'ngoe eaMyopicBakuli, HauenaEla Hloko Karolo ea NTHALOshoTenoa keboleng ba lense ha o tšohlaleihloRala moralo le tšebetso ea lense?
Ha re ithute ho hongKenya letsohoka TheLitlolo tsa litlolo le index ea theko e tlase.
Lens e ntle e hloka ho tšoana,Transmittancele ho hlaka. TLesela ho tloaelehileng haholo ke lebaka la lilemo tse ngata tsa ho ithuta.
| Nts'etsopele ea lisebelisoa tsa lense Boholo ba lilebeli tsa pele-pele li ne li etsoa ka thepa ea tlhaho tse kang quartz le kristale. Ka nts'etsopele ea tlhahiso ea khalase le theknoloji, lisebelisoa tsa tlhaho li ile tsa nkeloa sebaka ke likhalase tsa mahlo tse ileng tsa qala ho fana ka mesebetsi e mengata. Ho tloha ka bo-1980 ho fihlela ka bo-1980 thepa ea lapeng, e nkelitsoeng ka thepa ea eona e ntle ea tikoloho, 'me e ba lisebelisoa tse kholo tsa lilense tsa litsi tse ngata ho fihlela joale. |
Ha thepa e tsebahalang haholo 'marakeng, lisebelisoa tsa repon li eme haholo ke Ts'ireletso ea CR - 39mmeRedin Redin e ntlafalitsoe ke Koc, Korea ea Chec.
Manane a litsotsi a khetha index ea lense. Lens ea lense e theko ea theko e tlase ke karolelano ea ho jala e lebisang ho Vacuum ho ea ho khanya ea manseane, ho bonts'a bokhoni ba ho hana. Ka kakaretso, karolelano e phahameng ea lense, lense e tšesaane lense.
Hajoale,Bokahohlee na le index ea "5050, 1.53, 1.56, 1.60, 1.60, 1.67, 1.77, 1.74 le tse lingIndexes tsaLilense. Mabapi le thepa, re bolokile tšebelisano e haufi ea PPG ea PPG ea United States le Mitsui lik'hemik'hale tsa Japane'moho lelik'hamphani tse ling tsa thepa e tala tse nang le katleho e ikhethang.
CR-39 Ho rekoa lintho tse rekiloeng ho PPG, USA, li sebelisetsoa ho etsa lense ea theko e tlaase 1.50.E ratoa haholo 'marakeng bKe ka lebaka la ts'ebetso ea eona e nang le ts'oaetso e nang le kelello e ntle, ts'ebetso e ntle ea mahlo, ts'ebetso ea polokehommee theko e boima haholo.
Lens ea inter ea 1.53 e nkiloe ka thepa e khethehileng, Tsherex le ho tsoa ho PPG US. Lintho tse boima tsa mabelo a Trivex li hanyetsana haholo. Hobane ba bobebe ho feta lilense tse tloaelehileng, lilense tsa ThIVEX li tenghantle haholoKhetho ea mahlo a bana, e se nang leihlo, 'me e se nang leihlo la lipapali, lipapali tsa lipapali tsa lipapali, le mahlo a mahlo a lipapali.
LeNts'etsopele Of Likhalase, "Lens", e le tlatsetso e ka sehloohong ea likhalase, e lula e nchafatsa le ho ntlafatsa ka phetoho ea linako.BokahohleEmplical 1.60, 1.67, 1.74phahamengindexLisebelisoa tsa lense tse entsoeng ka 'Miti oa Mitsui oa Mitsui. Mr Serieske lisebelisoa tsa boleng bo phahameng le tse tsoetseng pele, tse nang le index e phahameng haholo, palo e phahameng, kholo e tlase, matla a matla a tšusumetso le menyetla e meng.
Ntlafatso e tsoelang pele ea thepa ea litsotsiR & dle theknolojiMatlafatsasehlahisoa sa lensesTLHOKOMELISOIon. Lisebelisoa tsa lenseFumana hore nabotsitsoea boleng, mokhoa oa ho fetisoa, ho hlaka le ho etsa pono.
Bokahohlee opeloang ke ho latela leano la tšebelisano ea katleho ea win le katleho. Ronamamela lentsoe la bareki,TsebaMorekis'Litlhoko, ela 'marakengtloaelo, joalo kaho theha pono e hlakileng.