Ulwazi olusisiseko lokufunda iiglasi kufuneka ukwazi

Iiglasi zokufunda luhlobo lweeglasi zamehlo, ezibonelela ngeendondo ze-myopia ezidla ngokusetyenziswa ngabantu abane-presbyopia, eye-convex lens. Iiglasi zokufunda zisetyenziselwa ukugcwalisa amehlo abantu abaphakathi kunye nabantu abadala. Njengeeglasi ze-myopia, banamaxabiso amaninzi esalathiso se-elektroniki afunekayo ngokwemigangatho yoshishino lwesizwe, kwaye bakwanazo nezicelo ezizodwa. Ngoko ke, iiglasi zokufunda kufuneka zixhotyiswe ngeeglasi.

Okokuqala, ulwahlulo olusisiseko lweeglasi zokufunda

Okwangoku, kukho iintlobo ezintathu eziphambili zeeglasi zokufunda kwimarike, ezizezi, ilensi yombono omnye, ilensi ye-bifocal kunye ne-asymptotic multifocal lens.

Ilensi yombono omnye inokusetyenziselwa kuphela ukubona kufutshane, kwaye umbono kufuneka ubuyiselwe xa ujonge umgama. Ilungele kuphela abantu abane-presbyopia elula kunye ne-frequency ephantsi yokusebenzisa iiglasi zokufunda;

I-Bifocals ibhekisa kwiiglasi zokufunda ezinelensi yomboniso ephezulu esetyenziselwa ukubona kude, kunye nelensi esezantsi yesiqingatha esetyenziselwa ukubona kufutshane, kodwa ezo glasi zokufunda ziya kuba nombono ongemfiliba kunye nokugqabhuka, kwaye ukunxiba ixesha elide kuqhelene kakhulu nobuhlungu bamehlo, isiyezi. , njl., i-design yasekhaya ayibukeka kakuhle, kwaye ayiqhelekanga ngoku; i-asymptotic multifocal lens inokuhlangabezana neemfuno zokungaboni kakuhle kwimigama eyahlukeneyo kumgama, phakathi nakufutshane. Inkangeleko yi-high-tech kunye nemfashini, kwaye ifaneleke ngakumbi kwi-myopia yangoku ngaphezu kweminyaka engama-40. Iso kunye ne-presbyopia, ukunxiba kweqela le-astigmatism.

Okwesibini, iimeko zokusetyenziswa kweeglasi zokufunda

I-Presbyopia yinto eqhelekileyo ye-physiological, kungekhona isifo samehlo, kwaye ayingomntu omdala kuphela. Emva kweminyaka engama-40, ngokuqiniswa ngokuthe ngcembe kwemicu yekhemikhali yelensi yamehlo kunye nokuba ndindisholo ngokuthe ngcembe komzimba weciliary, iliso lomntu alinakuhlengahlengisa ngokufanelekileyo inkangeleko yembonakalo (ukuguqulwa kweradial). Kuxhomekeke kumgama phakathi kwezinto, kufuneka uhambe kude xa ujonge izinto ezikufutshane phambi kokuba ubone kakuhle. Imeko yamehlo omabini ngeli xesha ibizwa ngokuba yi-presbyopia.

Ukuba i-presbyopia ifuna ukusebenzisa umbono wamehlo kumgama oqhelekileyo wokuziqhelanisa, kuyimfuneko ukunxiba iiglasi zokufunda ukuze ugcwalise umbono wamehlo, ukuze umbono okufutshane ubonakale ngokucacileyo kwakhona. Amehlo amabini. Iqondo le-myopia kwi-presbyopia lihambelana nobudala. Ngokunyuka kweminyaka, ukuwohloka kwe-lens yamehlo kuya kwanda, kwaye iqondo le-myopia liya kwanda ngokuthe ngcembe.

I-Presbyopia sele yenzekile, kwaye ukuba ugxininisa ukuba ungagqoki iiglasi zokufunda, umzimba we-ciliary uya kuphelelwa amandla kwaye awukwazi ukuhlengahlengisa, okuya kwandisa ngokuqinisekileyo ubunzima bokufunda, kubangele isiyezi, isiyezi kunye nezinye izifo ezininzi, eziya kubeka ubomi bemihla ngemihla engozini kwaye umsebenzi. Ukuzithemba okuphezulu. Ngoko ke, iiglasi ze-presbyopia kufuneka zihambelane ngokukhawuleza ngaphandle kokulibaziseka (abantu baseTshayina banengcamango ephosakeleyo: bacinga ukuba ukugqoka iiglasi zokufunda "isifo" esibi kakhulu, kwaye abaqapheli ubukho beeglasi zokufunda. Le ngcamango engalunganga) .

Emva kokukhula, iiglasi zokufunda ezixhotyiswe nge-myopia enganelanga kufuneka zitshintshwe ngokukhawuleza. Ngoko ke, iiglasi zokufunda akufanele zinxitywe ngalo lonke ixesha. Ukugqoka ixesha elide leeglasi zokufunda kunye neqondo elingafanelekanga le-myopia akuyi kubangela ingxaki enkulu kubomi bemihla ngemihla, kodwa kwakhona ukuqhubeka nokukhawulezisa inkqubo ye-binocular presbyopia.

Kwiimeko eziqhelekileyo, kukho izibonakaliso ezimbini eziphambili ze-presbyopia kwinqanaba lokuqala:

Eyokuqala ngumsebenzi osondeleyo okanye ukufunda nzima. Umzekelo, xa ufunda, kufuneka uyibambele kude le ncwadi, okanye ufunde kwindawo enemithombo yokukhanya eyomeleleyo ukuze uyiqonde.

Okwesibini kukudinwa kwamehlo. Ngokuncitshiswa kwamandla okuhlala, iimfuno zokufunda ngokuthe ngcembe zisondela kumda wamandla okuhlala, oko kukuthi, xa ufunda, ngokusisiseko onke amandla okuhlalisa amehlo omabini kufuneka asetyenziswe, ukwenzela ukuba akunakwenzeka ukusebenzisa amehlo ixesha elide, kwaye kulula kakhulu ukubangela ukudumba kwamehlo ngenxa yohlengahlengiso olugqithisileyo. , intloko ebuhlungu kunye nezinye iimpawu zokukhathala okubonakalayo.

Ukwenzeka kwezi meko zimbini zingasentla kubonisa ukuba amehlo anokukhula ngokuthe ngcembe. Kumaqela e-myopic, kuyimfuneko ukukhupha iiglasi ze-myopic okanye ulungelelanise incwadi yokufunda kude xa ufunda kwindawo esondeleyo, eyona nto ibonakalisa i-presbyopia. Emva kokuba omabini amehlo e-presbyopic, eyona ndlela ikhuselekileyo kukunxiba iiglasi zokufunda ezifanelekileyo zokulinganisa.