Ho ea ka likhakanyo tsa Mokhatlo oa Lefatše oa Bophelo (WHO), palo ea batho ba nang le myopia e phahame haholo.e kholo ka ho fetisisahar'a batho ba nang le mahlo a sa pheleng hantle, lee na lefihlellaed2.6 bilione ka 2020. Myopia e fetohile bothata bo boholo ba lefats'e, haholo-holo ka boteboAsia. Sekhahla sa myopia Chaena ke 47.1%, e leng hoo e ka bang halofo ea baahi bohle.E bolela e le 'ngoeho batho ba babeli ho na le pono e haufi.
Sekhahla sa Myopia Linaheng tse Fapaneng
Matsatsing ana,lekeketseho e kholo ea sekhahla sa myopia, sekhahla saho aparalikhalase le tsona lia eketseha selemo le selemo.Jwalo ka e mong walefu la myopiabakuli, hana le uenaela hloko ntlha enasseo defelisaboleng ba lense ha ho nahanoaleihlomoralo oa ho roala le mosebetsi oa lense?
A re ithute ho hongbohlokoaka ethepa ea lense le index ea refractive.
Lense e ntle e hloka ho lekana,phetisetsole ho hlaka. TLense e atileng haholo kajeno ke litholoana tsa lilemo tsa ho hlahloba.
| Ntlafatso ea lisebelisoa tsa lense Bongata ba lilense tsa pele li entsoe ka letsoho ka thepa ea tlhaho e kang quartz le kristale. Ka nts'etsopele ea tlhahiso ea khalase le theknoloji ea indasteri, thepa ea tlhaho e ile ea 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 ho bo-1980, thepa ea resin, e entsoeng ka peterole, e nkile sebaka sa khalase bakeng sa thepa ea eona e betere ea optical, ts'ebetso e sireletsehileng le thepa e tšesaane ea 'mele,' me e fetohile thepa e ka sehloohong ea lilense tsa khalase ea mahlo ho fihlela joale. |
Jwalo ka thepa ya lense e tsebahalang haholo mmarakeng, thepa ya resin e emelwa haholo ke resin ya CR-39 e hlahisitsweng ke PPG, resin ya MR e hlahisitsweng ke Mitsui,leResin ea KR e ntlafalitsoe ke KOC, Korea, jj.
Thepa ea lense e khetholla index ea refractive ea lense. Index ea refractive ea lense ke karolelano ea lebelo la ho phatlalatsoa ha leseli ka har'a vacuum ho ea lebelo la ho phatlalatsoa ha leseli ka har'a lense, e bonts'ang bokhoni ba refractive ba lense ho khanya. Ka kakaretso, ha index ea refractive ea lense e phahame, lense e ba tšesaane.
Hajoale,Bokahohle ba Opticale na le index ea refractive ea 1.50, 1.53, 1.56, 1.60, 1.67, 1.74 le tse ling.li-index tsaLilense. Mabapi le thepa, re bolokile tšebelisano-'moho e haufi-ufi 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 ho PPG, USA, e sebelisoa ho etsa lense ea refractive index 1.50.E ratoa haholo 'marakeng bka lebaka la coefficient ea eona e phahameng ea Abbe, ts'ebetso e ntle ea optical, ts'ebetso ea polokeholee theko e tlaase haholoanyane.
Lense ea index ea refractive ea 1.53 e nkiloe thepa e khethehileng, Trivex, eo hape e tsoang ho PPG e US. Thepa ea lense ea Trivex e hanela tšusumetso haholo. Hobane li bobebe ho feta lilense tse tloaelehileng, lilense tsa Trivex li bobebe.hantle haholokhetho bakeng sa likhalase tsa mahlo tsa bana, likhalase tsa mahlo tse se nang moeli, likhalase tsa mahlo tsa lipapali, likhalase tsa mahlo tse sireletsehileng, le likhalase tsa mahlo tsa lipapali.
Kants'etsopele olikhalase tsa f, "lense", e le sesebelisoa se seholo sa likhalase, li lula li ntlafatsa le ho ntlafatsa ka linako tse fetohang.BokahohleOptical 1.60, 1.67, 1.74holimoindexLisebelisoa tse tala tsa lense li entsoe ka letoto la MR la Mitsui ChemicalLetoto la MRke thepa ea boleng bo holimo le e tsoetseng pele, e nang le index e phahameng ea refractive, palo e phahameng ea Abbe, matla a khoheli a itseng a tlase, khanyetso e phahameng ea tšusumetso le melemo e meng.
Ntlafatso e tsoelang pele ea thepa ea lenseR&Dle theknolojimatlafatsasehlahisoa sa lensesinnovateioneLisebelisoa tse tala tsa lensefumana hore nabotsitsoea boleng, phetiso, ho hlaka le phello ea pono.
BokahohleOptical e ntse e latela leano la tšebelisano-'moho ea bohle le katleho e kopanetsoengRemamela lentsoe la bareki,tsebamorekis'litlhoko tsa 'maraka, ela hloko' marakatšekamelo, joalo ka haho theha pono e hlakileng haholoanyane.