Ho ea ka likhakanyo tsa Mokhatlo oa Lefatše oa Bophelo (WHO), palo ea batho ba nang le myopia kekholo ka ho fetisisahar'a batho ba nang le mahlo a bophelo bo botle, lee na lefihlaed2.6 bilione ka 2020. Myopia e fetohile bothata bo boholo lefatšeng ka bophara, e tebileng haholonaheng ea Asia. Sekhahla sa myopia Chaena ke 47.1%, hoo e batlang e le halofo ea kakaretso ea baahi.E bolela e le nngweho batho ba bang le ba bang ba babeli o bonela haufi.
Sekhahla sa Myopia Linaheng Tse Fapaneng
Matsatsing ana,kakeketseho e kholo ea sekhahla sa myopia, sekhahla saaperelikhalase le tsona li ntse li eketseha selemo le selemo.Joalo ka e 'ngoe eamyopicbakuli,have uenaela hloko ntlhashore defelisaboleng ba lense ha ho nahanoaleihloho apara moralo le ts'ebetso ea lense?
Ha re ithuteng ho hongbohlokoat mabapi thelisebelisoa tsa lense le index ea refractive.
Lense e ntle e hloka ho tšoana,phetisole ho hlaka. Tlense e atileng haholo kajeno ke phello ea lilemo tsa lipatlisiso.
| Tsoelo-pele ea lisebelisoa tsa lense Boholo ba lilense tsa khale li entsoe ka letsoho ka lisebelisoa tsa tlhaho tse kang quartz le kristale. Ka nts'etsopele ea tlhahiso ea likhalase le theknoloji ea indasteri, lisebelisoa tsa tlhaho li ile tsa nkeloa sebaka ka potlako ke khalase ea optical e ileng ea qala ho fana ka mesebetsi e mengata. Ho tloha lilemong tsa bo-1960 ho isa lilemong tsa bo-1980, lisebelisoa tsa resin, tse entsoeng ka petroleum, li nkile sebaka sa khalase bakeng sa thepa ea eona e ntle ea optical, ts'ebetso e sireletsehileng le thepa ea 'mele e tšesaane,' me e fetohile lisebelisoa tsa mantlha tsa lilense tsa mahlo ho fihlela joale. |
Joalo ka lisebelisoa tsa lense tse tsebahalang haholo 'marakeng, lisebelisoa tsa resin li emeloa haholo ke resin ea CR-39 e ntlafalitsoeng ke PPG, resin ea MR e ntlafalitsoeng ke Mitsui,leKR resin e ntlafalitsoeng ke KOC, Korea, joalo-joalo.
Thepa ea lense e etsa qeto ea index ea refractive ea lense. Lense refractive index ke karo-karolelano ea lebelo la ho hasana ha leseli ho vacuum ho lebelo la ho hasana ha leseli ho lisebelisoa tsa lense, e bonts'ang matla a ho refraction a lense ho khanya. Ka kakaretso, ha lense e phahamisa index ea refractive, lense e ba tšesaane.
Hajoale,Universe Opticale na le index ea refractive ea 1.50, 1.53, 1.56, 1.60, 1.67, 1.74 le tse lingindexes ealilense. Mabapi le lisebelisoa, re bolokile tšebelisano e haufi ea maano le PPG ea United States le Mitsui Chemical ea Japane.'moho lelik'hamphani tse ling tsa thepa e tala tse nang le katleho e ikhethang.
CR-39 thepa e tala e rekiloeng PPG, USA, e sebelisoa ho etsa refractive index 1.50 lens.E ratoa ho feta 'marakeng bka lebaka la coefficient ea eona e phahameng ea Abbe, ts'ebetso e ntle ea optical, ts'ebetso ea polokeholee baballang chelete e ngata.
Lense ea 1.53 refractive index e nkiloe ho thepa e khethehileng, Trivex, hape e tsoang PPG ea US. Lisebelisoa tsa lense tsa Trivex ha li na tšusumetso e matla. Hobane li bobebe ho feta lilense tse tloaelehileng, lilense tsa Trivex li joalohantle haholokhetho bakeng sa liaparo tsa mahlo tsa bana, liaparo tsa mahlo tse se nang rimless, likhalase tsa lipapali, liaparo tsa mahlo tsa tšireletso, le liaparo tsa mahlo tsa lipapali.
Le lentshetsopele of likhalase, "lense", e le sesebelisoa se ka sehloohong sa likhalase, e lula e ntlafatsa le ho ntlafatsa le ho fetoha ha linako.BokahohleOptical 1.60, 1.67, 1.74hodimoindexlisebelisoa tse tala tsa lense li entsoe ka letoto la MR la Mitsui Chemical. MR letotoke lisebelisoa tsa boleng bo holimo le tse tsoetseng pele, tse nang le index e phahameng ea refractive, palo e phahameng ea Abbe, matla a khoheli a tlase, khanyetso e phahameng le melemo e meng.
Ntlafatso e tsoelang pele ea lisebelisoa tsa lenseR&Dle thekenolojiboost thesehlahisoa sa lensesqapaion. Lisebelisoa tse tala tsa lenseetsa qeto eabotsitsotsa boleng, phetiso, ho hlaka le phello ea pono.
Bokahohleoptical e 'nile ea khomarela leano la tšebelisano-'moho le katleho e kopanetsoeng. Ronamamela lentsoe la bareki,tsebamorekis'litlhoko, ela hloko 'marakatšekamelo, joalo kaho bopa pono e hlakileng.