Kukho iindidi ezi-4 eziphambili zokulungiswa kombono-emmetropia, myopia, hyperopia, kunye ne-astigmatism.
I-Emmetropia ngumbono ogqibeleleyo. Iliso sele likhanye ngokugqibeleleyo ekukhanyeni kwi-retina kwaye ayifuni ukulungiswa kweeglasi.
I-Myopia yaziwa kakhulu njengokubona kufutshane. Kwenzeka xa iliso lide kancinane, nto leyo ekhokelela ekubeni ukukhanya kugxile phambi kweretina.
Ukuze ulungise i-myopia, ugqirha wakho wamehlo uya kumisela iilensi ezincinci (-X.XX). Ezi lens zithabatha zityhalela umva indawo ekugxilwe kuyo ukuze ilungelelaniswe ngokuchanekileyo kwiretina.
I-Myopia yeyona ndlela ixhaphakileyo yempazamo ye-refraction kuluntu lwanamhlanje. Enyanisweni, eneneni kucingelwa ukuba ngubhubhani wehlabathi lonke, njengoko besanda abantu abaninzi abafunyaniswa benale ngxaki minyaka le.
Aba bantu banokubona lukhulu ngokusondeleyo, kodwa izinto ezikude zibonakala zimfiliba.
Ebantwaneni, unokuqaphela ukuba umntwana unobunzima bokufunda ibhodi esikolweni, ephethe izinto zokufunda (iiselfowuni, iincwadi, ii-iPads, njl.njl.) esondele ngokungaqhelekanga ebusweni bakhe, ehleli kufutshane kakhulu nomabonwakude kuba “akakwazi. bona”, okanye nkqu nokukrwaqula okanye ukucikica amehlo kakhulu.
I-Hyperopia, kwelinye icala, yenzeka xa umntu ebona kude, kodwa unokuba nobunzima bokubona izinto ezikufutshane.
Ezinye zezona zikhalazo zixhaphakileyo nge-hyperopes ayikuko ukuba ababoni, kodwa endaweni yoko bafumana intloko ebuhlungu emva kokufunda okanye ukwenza umsebenzi wekhompyuter, okanye amehlo abo ahlala eziva ediniwe okanye ediniwe.
I-Hyperopia yenzeka xa iliso lifutshane kakhulu. Ke ngoko, ukukhanya kugxile kancinci emva kweretina.
Ngombono oqhelekileyo, umfanekiso ugxininise kabukhali kumphezulu we-retina. Ekujongeni kude (hyperopia), i-cornea yakho ayikukhanyeli ukukhanya ngokufanelekileyo, ngoko ke indawo ekugxilwe kuyo iwela emva kweretina. Oku kwenza ukuba izinto ezikufutshane zibonakale zimfiliba.
Ukulungisa i-hyperopia, oogqirha bamehlo bamisela iilensi ze-plus (+X.XX) ukuzisa indawo yokugxila phambili emhlabeni ngokuchanekileyo kwi-retina.
I-Astigmatism sesinye isihloko. I-Astigmatism yenzeka xa umphezulu weliso (ukhozo) ungekho ngqukuva ngokugqibeleleyo.
Cinga nge-cornea eqhelekileyo ejongeka njengebhola yomnyazi esike phakathi. Igqibelele kwaye ilingana macala onke.
I-astigmatic cornea ijongeka ngakumbi njengeqanda elibilisiweyo elisikwe phakathi. Enye i-meridian inde kunomnye.
Ukuba ne-meridians ezimbini ezimile ezahlukeneyo zeliso kubangela iingongoma ezimbini ezahlukeneyo zokugxila. Ke ngoko, i-lens yeglasi kufuneka yenziwe ukulungisa zombini iimeridians. Lo myalelo uya kuba namanani amabini. Umzekelo-1.00 -0.50 X 180.
Inani lokuqala libonisa amandla afunekayo ukulungisa i-meridian enye ngelixa inani lesibini libonisa amandla afunekayo ukulungisa enye i-meridian. Inombolo yesithathu (X 180) ichaza ngokulula apho i-meridians ezimbini zilele khona (zinokuqala ukusuka ku-0 ukuya kwi-180).
Amehlo afana neminwe—akukho mibini ifana ncam. Sifuna ukuba ubone okona kulungileyo, ngoko ke ngokutyebileyo kwemveliso yeelensi sinokusebenza kunye ukufumana isisombululo esigqibeleleyo sokuhlangabezana neemfuno zakho.
I-Universe inokunika iilensi ezingcono ukulungisa ezi ngxaki zamehlo zingentla. Pls sigxile kwiimveliso zethu:www.universeoptical.com/products/