Ii-varifocals kunye nee-biifocals zazo zombini iintlobo zeelebhu zamehlo ezenzelwe ukujongana nemicimbi yemibono enxulumene nePressopia, imeko enxulumene nale minyaka ichaphazelayo. Ngelixa zombini iintlobo zeelensi ziyanceda abantu babona ukuba baninzi, bahluke kuyilo kunye nokusebenza. Kule ntetho igqibeleleyo, siya kuphonononga umahluko ophambili phakathi kwee-varifocal kunye neebhasi, kubandakanya nokusebenza kwazo, izibonelelo, ukusilela, kunye nokuqwalaselwa ngokukhetha enye kwenye.
Ii-bifocals: Iibhendi zangenziwa nguBenjamin Franklin ngasekupheleni kwenkulungwane ye-18 kwaye zinamacandelo amabini ahlukileyo. Inxalenye ephezulu yelensi isetyenziselwa umbono womgama, ngelixa isahlulo esisezantsi sichongwe kumbono kufutshane.
Ulwakhiwo:I-lenses ye-Bifocal ibonakaliswa ngumgca obonakalayo obonakalayo owahlula amacandelo eelensi ezimbini. Lo mgca ubizwa ngokuba "yi-BifoCal umgca," kwaye inika inqaku elicacileyo lenguqulo yotshintsho phakathi komgama kunye neenxalenye zemboleko zelensi.
Izibonelelo zeXesha:Inzuzo eyintloko yeelensi ze-bibulal kukwahlukana kwabo kufutshane nomgama kwaye kufutshane nombono. Inguqu engxamisekileyo kumgca we-bifacal uvumela abaqhubi ukuba batshintshe ngokulula phakathi komgama ophambili ngokujonga kwicandelo elifanelekileyo lelensi.
Iingxaki:Enye yeendlela eziphambili ze-biifocals ngumgca obonakalayo, onokuba nguye onobuhle. Ukongeza, utshintsho oluqhekekayo phakathi kwamacandelo eelensi ezimbini lunokubangela ukungakhethi bucala okanye ukugqwetha, ngakumbi ngexesha lokutshintsha ngokukhawuleza kwi-gaze phakathi komgama kunye nezinto ezikufutshane.
Ukuqwalaselwa:Xa ujonga iibhotocals, umntu ngamnye kufuneka azi ukuba ufuna umbono wakhe kunye nezinto ozithandayo. Ii-biifocals zikhethe ezifanelekileyo abo baneemfuno ezahlukileyo nenokuqikelelwa kumgama kunye nokulungiswa kombono kufutshane.
Ii-varifocals:Ii-varifocals, ezikwabizwa njengezilonda ezihambelanayo, zibonelela ngotshintsho olungenamthungo phakathi komgama ogxile kakhulu ngaphandle komgca obonakalayo ofumaneka kwii-bifuchols. Ezi lens zibonelela ngokulandelelana komgama, eziphakathi, kwaye kufutshane nembono yelensi enye.
Ulwakhiwo:I-varifocal lenses ibonisa ukuqhubela phambili kwe-lens yelensi ukusuka phezulu ukuya ezantsi, kuvumela ababukhali ukuba bafumane ukugxila kwabo phakathi komda obonakalayo ngaphandle komgca obonakalayo ngaphandle komda ophakathi. Ngokungafaniyo nee-bifocals, iilensi ze-varifocal azinalo iqhekeza elibonakalayo, libonisa imbonakalo yendalo engaphezulu neyeenyani.
Izibonelelo zeXesha:Eyona nto iphambili kwii-varifocals kukukwazi kwabo ukubonelela ngokuqhubekayo, umbono wendalo kumgama ohlukeneyo. Olu tshintsho luvumela ababuthathaka ukuba batshintshele ngokutsha phakathi, phakathi ephakathi, kwaye kufutshane nombono ngaphandle kokufumana i-shift ye-biFOcal.
Iingxaki:Ngelixa ii-varifocals zibonelela ngamava abonakalayo endalo, abanye abaphetheyo banokufuna ixesha lokutshintsha kwindalo eqhubekayo yeelensi. Eli xesha lohlengahlengiso, idla ngokubizwa ngokuba "luziqhelaniso,
Ukuqwalaselwa:Xa ujonga ii-varifolocals, abantu kufuneka bazithathele ingqalelo indlela yabo yokuphila kunye nemikhwa ebonakalayo. Iilensi ze-varifocal zilungele abo bafuna ukulungiswa komthungo kuwo kwaye banqwenela ukuba sibe silumkile kwaye sithande ilensile.
Ukukhetha phakathi kwee-varifocals kunye neebhastile: Xa uthatha isigqibo phakathi kwee-varifocal kunye neebhasi, izinto ezininzi kufuneka ziqwalaselwe ukuqinisekisa eyona ndlela ifanelekileyo kunye neemfuno zokubonwayo.
Indlela yokuphila kunye nemisebenzi:Cinga ngemisebenzi ethile kunye nemisebenzi efuna umbono ocacileyo kwimigama eyahlukeneyo. Umzekelo, abantu angabandakanya utshintsho olwenzeka rhoqo phakathi kwesondlo nakweli mbono ongenamthungo osinikezelwe zii-varifocals. Kwelinye icala, abo baneemfuno zombono onokuqikelelwa ziimfuno zinokufumana ii-bifuchols ukuba zilukhetho olusebenzayo.
Ukukhetha ubuhle:Abanye abantu banokukhetha ngokuqinileyo malunga nokubonakala kweeglasi zabo zamehlo. Ii-varifocals, ngokungabikho komgca obonakalayo, zihlala zinika ukhetho olumnandi kakhulu labaphathi ababeka phambili inkathalo ebeka phambili, jonga kwale mihla. Iibhayili, kunye nomgca wazo we-Bifocal, zisenokungathandeki kwimikhwa elungileyo.
Intuthuzelo kunye nokuLungisa:Kuya kuthathelwa ingqalelo kwilizwe lohlengahlengiso olufunekayo kwii-farifocals kunye neebhasi. Ngelixa ii-varifocals zibonelela ngotshintsho lwendalo phakathi komgama ojolise kuyo, abasesikweni banokuthi badinga ixesha lokuziqhelanisa nelensi yelensi. Abakhupheli be-Bifocal banokufumana uhlengahlengiso olukhawulezileyo ngenxa yomahluko ocacileyo phakathi komgama kunye namacandelo abo kufutshane.
Unyango kunye nombono:Abantu abanomgangatho wombono ontsonkothileyo okanye imingeni ethile ebonakalayo inokufumanisa ukuba uhlobo lwelensi lube ngcono iimfuno zabo. Kubalulekile ukuba unxibelelane neliso lamehlo ukumisela eyona nto ifanelekileyo ye-lens efanelekileyo ngokusekwe kwiimfuno zombono ngamnye.
Ukuqukumbela, ii-varifocals kunye nee-bifocals zahlukile kulwakhiwo, izibonelelo zokuhamba, ukubetha, kunye nokuqwalaselwa kwabaphetheyo. Ngelixa iibhastile zibonelela umahluko ocacileyo phakathi komgama kwaye kufutshane nombono kunye nomgca obonakalayo, ii-varifocals zibonelela ngotshintsho olungenamthungo phakathi komgama ogxile kwicandelo. Xa ukhetha phakathi kwee-varifocals kunye neebhastile, indlela yokuphila, ubuhle, intuthuzelo, ukulungelelaniswa, kunye neemfuno zombono ngamnye kufuneka ziqwalaselwe. Ngokuqonda iimpawu ezahlukeneyo kunye neembonakalo ezinxulumene nohlobo lwe-lensi nganye, abantu banokwenza isigqibo esibengezelayo sokujongana neemfuno zabo zombono.
IXESHA LOKUQALA: FEB-04-2024