yintoni umahluko phakathi kwe-varifocals kunye ne-bifocals

I-Varifocals kunye ne-bifocals zombini iindidi ze-lens zeglasi eyenzelwe ukujongana nemiba yombono enxulumene ne-presbyopia, imeko eqhelekileyo enxulumene neminyaka echaphazela kufuphi nombono.Ngelixa zombini ezi ntlobo zeelensi zinceda abantu ukuba babone kumgama omninzi, ziyahluka kuyilo kunye nokusebenza.Kolu thelekiso lubanzi, siza kuphonononga umahluko ophambili phakathi kwe-varifocals kunye ne-bifocals, kubandakanya ukwakhiwa kwazo, iinzuzo, ukusilela, kunye nokuqwalaselwa kokukhetha enye phezu komnye.

Bifocals: I-Bifocals yaqanjwa nguBenjamin Franklin ngasekupheleni kwenkulungwane ye-18 kwaye inamacandelo amabini ahlukeneyo e-lens.Inxalenye ephezulu yelensi isetyenziselwa ukubona umgama, ngelixa isahlulo esisezantsi senzelwe umbono okufutshane.

Ulwakhiwo:Iilensi ze-Bifocal zibonakaliswa ngumgca othe tye obonakalayo owahlula amacandelo amabini e-lens.Lo mgca ubizwa ngokuba "ngumgca we-bifocal," kwaye ubonelela ngesalathisi esicacileyo senguquko phakathi komgama kunye neenxalenye zombono ezikufutshane zelensi.

Izibonelelo zamehlo:Inzuzo ephambili yeelensi ze-bifocal kukwahlula kwazo ngokucacileyo phakathi komgama kunye nombono okufutshane.Utshintsho olukhawulezileyo kumgca we-bifocal luvumela abanxibi ukuba batshintshe ngokulula phakathi kwemigama emibini ekugxilwe kuyo ngokujonga kwicandelo elifanelekileyo lelensi.

Imiqobo:Enye yeengxaki eziphambili ze-bifocals ngumgca obonakalayo, onokuthi ungabonakali ngobuhle kwabanye abantu.Ukongezelela, ukuguquka ngokukhawuleza phakathi kwamacandelo amabini e-lens kunokubangela ukuphazamiseka okubonakalayo okanye ukuphazamiseka, ngakumbi ngexesha lokutshintsha ngokukhawuleza ekujongeni phakathi komgama kunye nezinto ezikufutshane.

Iingqwalasela:Xa kuqwalaselwa i-bifocals, abantu kufuneka bazazi iimfuno zabo zombono kunye nezinto abazikhethayo.I-Bifocals lukhetho olufanelekileyo kwabo baneemfuno ezahlukileyo kunye neziqikelelwayo zomgama kunye nokulungiswa kombono okufutshane.

Iintlobo ezahlukeneyo:I-Varifocals, ekwabizwa ngokuba ziilensi eziqhubekayo, zibonelela ngenguqu engenamthungo phakathi kwemigama egxininisiweyo emininzi ngaphandle komgca obonakalayo ofumaneka kwi-bifocals.Ezi lens zibonelela ngolungiso kumgama, ophakathi, kunye nombono okufutshane ngaphakathi koyilo lwelensi enye.

Ulwakhiwo:Iilensi ze-Varifocal zibonisa ukuqhubela phambili ngokuthe ngcembe kwamandla e-lens ukusuka phezulu ukuya ezantsi, okuvumela abanxibi ukuba batshintshe ngaphandle komthungo ukugxila kwabo phakathi kwemigama eyahlukeneyo ngaphandle komgca obonakalayo.Ngokungafaniyo ne-bifocals, iilensi ze-varifocal azinalo ulwahlulo lwecandelo elibonakalayo, ezinikezela ngembonakalo yendalo kunye neyobuhle.

Izibonelelo zamehlo:Inzuzo ephambili ye-varifocals kukukwazi kwabo ukubonelela ngokuqhubekayo, ukulungiswa kombono wendalo kwimigama eyahlukeneyo.Olu yilo luvumela abanxibi ukuba batshintshe ngokutyibilikayo phakathi kokude, okuphakathi, kunye nombono okufutshane ngaphandle kokutshintsha ngokukhawuleza okuhambelana neelensi ze-bifocal.

Imiqobo:Ngelixa i-varifocals inikezela ngamava abonakalayo endalo, abanye abanxibi banokufuna ixesha lokuhlengahlengisa kwimo eqhubekayo yeelensi.Eli xesha lohlengahlengiso, elidla ngokubizwa ngokuba “luhlengahlengiso,” linokubandakanya ukuziqhelanisa nemimandla eyahlukeneyo yokubona ngaphakathi kwilensi nokufunda ukusebenzisa ilensi ngempumelelo kwimisebenzi eyahlukeneyo.

Iingqwalasela:Xa uqwalasela i-varifocals, abantu ngabanye kufuneka bathathele ingqalelo indlela yabo yokuphila kunye nemikhwa yokubona.Iilensi zeVarifocal zifanelekile kwabo bafuna ulungiso lombono olungenamthungo kwimigama emininzi kwaye banqwenela uyilo lwelensi olulumke ngakumbi nolukholisayo.

Ukukhetha phakathi kwe-Varifocals kunye ne-Bifocals: Xa uthatha isigqibo phakathi kwe-varifocals kunye ne-bifocals, izinto ezininzi kufuneka ziqwalaselwe ukuqinisekisa eyona ndlela ifanelekileyo yokukhethwa komntu kunye neemfuno ezibonakalayo.

Indlela yokuphila kunye neMisebenzi:Qwalasela imisebenzi ethile kunye nemisebenzi efuna umbono ocacileyo kwimigama eyahlukeneyo.Umzekelo, abantu abamsebenzi wabo ubandakanya ukutshintsha rhoqo phakathi kombono okufutshane kunye nokude banokuzuza kutshintsho olungenamthungo olubonelelwa ngee-varifocals.Kwelinye icala, abo baneemfuno zombono ezinokuqikelelwa ngakumbi banokufumana i-bifocals njengokhetho olusebenzayo.

Ubuhle Bezinto Ezikhethwayo:Abanye abantu basenokuthanda kakhulu inkangeleko yeendondo zabo.I-Varifocals, ngokungabikho komgca obonakalayo, ihlala inika inketho ekhangayo ngakumbi kubathwali ababeka phambili imbonakalo engenamthungo, yanamhlanje.Ii-Bifocals, ezinomgca wazo we-bifocal owahlukileyo, zisenokungabi nomtsalane kangako kwimbono yobuhle.

Ukuthuthuzela kunye nokuziqhelanisa:Ukuqwalaselwa kufuneka kunikwe ixesha lohlengahlengiso olufunekayo kuzo zombini i-varifocals kunye ne-bifocals.Ngelixa i-varifocals ibonelela ngotshintsho lwendalo ngakumbi phakathi komgama ogxilileyo, abanxibi banokufuna ixesha lokuziqhelanisa noyilo lwelensi oluqhubekayo.Abanxibi be-Bifocal banokufumana ukuziqhelanisa ngokukhawuleza ngenxa yomahluko ocacileyo phakathi komgama kunye namacandelo akufutshane ombono.

Ummiselo kunye neemfuno zombono:Abantu abanemigqaliselo entsokothileyo yombono okanye imiceli mngeni ethile yokubonwa banokufumanisa ukuba olunye uhlobo lwelensi luzilungele ngcono iimfuno zabo.Kubalulekile ukubonisana nengcali yokunakekelwa kwamehlo ukumisela eyona ndlela ifanelekileyo yelensi ngokusekelwe kwiimfuno zombono ngamnye.

Ukuqukumbela, i-varifocals kunye ne-bifocals ziyahluka kulwakhiwo, izibonelelo zamehlo, imiqobo, kunye nokuqwalaselwa kwabathwali.Ngelixa i-bifocals ibonelela ngokucacileyo umahluko phakathi komgama kunye nombono osondeleyo kunye nomgca obonakalayo, i-varifocals inikezela ngenguqu engenamthungo phakathi kwemigama emininzi egxininisekile ngaphandle kokwahlula kwecandelo elibonakalayo.Xa ukhetha phakathi kwe-varifocals kunye ne-bifocals, indlela yokuphila, ukhetho lobuhle, induduzo, ukulungelelanisa, kunye neemfuno zombono ngamnye kufuneka ziqwalaselwe.Ngokuqonda iimpawu ezahlukileyo kunye neengqwalaselo ezinxulumene nohlobo ngalunye lwelensi, abantu banokwenza isigqibo esinolwazi lokujongana neemfuno zabo zombono.