Ama-Varifocals nama-bifocals yizinhlobo zombili zamalensi engilazi yamehlo adizayinelwe ukubhekana nezinkinga zokubona ezihlobene ne-presbyopia, isimo esivamile esihlobene nobudala esithinta eduze nokubona.Yize zombili izinhlobo zamalensi zisiza abantu ukuthi babone amabanga amaningi, ziyahluka ngomklamo nokusebenza.Kulesi siqhathaniso esibanzi, sizohlola umehluko oyinhloko phakathi kwama-varifocals nama-bifocals, okuhlanganisa ukwakhiwa kwawo, izinzuzo, izithiyo, nokucatshangelwa kokukhetha enye phezu kokunye.
I-Bifocals: I-Bifocals yasungulwa ngu-Benjamin Franklin ngasekupheleni kwekhulu le-18 futhi iqukethe izingxenye ezimbili ezihlukene zamalensi.Ingxenye engenhla yelensi isetshenziselwa ukubona kude, kanti ingxenye engezansi yakhelwe ukubona eduze.
Ukwakha:Amalensi e-Bifocal abonakala ngomugqa ovundlile obonakalayo ohlukanisa izigaba ezimbili zamalensi.Lo mugqa ubizwa ngokuthi "umugqa we-bifocal," futhi unikeza inkomba ebonakalayo ecacile yoshintsho phakathi kwebanga nezingxenye zombono eziseduze zelensi.
Izinzuzo zamehlo:Inzuzo eyinhloko yamalensi e-bifocal ukuhlukanisa kwawo okucacile phakathi kwebanga nokubona eduze.Ukushintsha okungazelelwe emugqeni we-bifocal kuvumela abagqokile ukuthi bashintshe kalula phakathi kwamabanga amabili agxilile ngokubheka esigabeni esifanele selensi.
Amaphutha:Enye yezingqinamba eziyinhloko zama-bifocal umugqa obonakalayo, ongase ungakhangi ngobuhle kwabanye abantu.Ukwengeza, ukuguquka okungazelelwe phakathi kwezigaba ezimbili zamalensi kungabangela ukungakhululeki okubonakalayo noma ukuhlanekezela, ikakhulukazi phakathi nokushintsha okusheshayo kokubuka phakathi kwebanga nezinto eziseduze.
Okucatshangwayo:Lapho kucutshungulwa ama-bifocal, abantu kufanele baqaphele izidingo zabo zombono kanye nezinto abazithandayo.Ama-Bifocals ayindlela efanelekile yalabo abanezidingo ezihlukile nezibikezelwayo zebanga kanye nokulungiswa kombono oseduze.
I-Varifocals:I-Varifocals, eyaziwa nangokuthi amalensi aqhubekayo, inikeza uguquko olungenamthungo phakathi kwamabanga agxilile amaningi ngaphandle komugqa obonakalayo otholakala kuma-bifocals.Lawa ma-lens ahlinzeka ngokulungiswa kwebanga, okumaphakathi, nokuseduze nokubona ngaphakathi kwedizayini yelensi eyodwa.
Ukwakha:Amalensi e-Varifocal afaka ukuqhubeka kancane kancane kwamandla amalensi ukusuka phezulu ukuya phansi, okuvumela abagqokile ukuthi bashintshe kalula ukugxila kwabo phakathi kwamabanga ahlukene ngaphandle komugqa obonakalayo.Ngokungafani nama-bifocals, amalensi e-varifocal awanakho ukuhlukaniswa kwesegimenti ebonakalayo, anikeza ukubukeka okungokwemvelo nokujabulisa ngobuhle.
Izinzuzo zamehlo:Inzuzo eyinhloko ye-varifocals yikhono labo lokuhlinzeka ngokuqhubekayo, ukulungiswa kombono wemvelo emabangeni ahlukahlukene.Lo mklamo uvumela abagqokile ukuthi bashintshe ngokushelelayo phakathi kokude, okumaphakathi, nokuseduze kokubona ngaphandle kokubona uguquko olusheshayo oluhlotshaniswa namalensi e-bifocal.
Amaphutha:Nakuba ama-varifocals enikeza umuzwa obonakalayo wemvelo kakhudlwana, abanye abagqokile bangase badinge isikhathi sokuzivumelanisa nemvelo eqhubekayo yamalensi.Lesi sikhathi sokulungisa, esivame ukubizwa ngokuthi "ukuzivumelanisa nezimo," singabandakanya ukujwayela izindawo ezihlukene zokubona ngaphakathi kwelensi nokufunda ukusebenzisa ilensi ngempumelelo emisebenzini ehlukahlukene.
Okucatshangwayo:Lapho ucubungula i-varifocal, abantu kufanele bacabangele indlela yabo yokuphila nemikhuba yokubuka.Amalensi ahlukahlukene alungele labo abadinga ukulungiswa okungenamthungo kokubona kumabanga amaningi futhi bafise idizayini yelensi ehlakaniphe kakhulu futhi ejabulisa ngobuhle.
Ukukhetha Phakathi kwe-Varifocals ne-Bifocals: Lapho unquma phakathi kwe-varifocals ne-bifocals, izici ezimbalwa kufanele zicatshangelwe ukuze kuqinisekiswe inketho efanelekile kakhulu yezintandokazi zomuntu ngamunye kanye nezidingo ezibukwayo.
Indlela Yokuphila Nemisebenzi:Cabangela imisebenzi ethile kanye nemisebenzi edinga umbono ocacile emabangeni ahlukene.Isibonelo, abantu abamsebenzi wabo ubandakanya ukushintshwa okuvamisile phakathi kokubona eduze nakude bangase bazuze ekuguqukeni okungenazihibe okunikezwa ama-varifocals.Ngakolunye uhlangothi, labo abanezidingo zombono ezibikezelwayo bangase bathole ukuthi i-bifocal iyisinqumo esisebenzisekayo.
Izintandokazi zobuhle:Abanye abantu bangase bakuthande kakhulu ukubukeka kwezibuko zabo.I-Varifocals, ngokungabi bikho komugqa obonakalayo, ngokuvamile inikeza inketho ebukeka kahle kakhulu yabagqoki ababeka kuqala ukubukeka okungenamthungo, kwesimanje.Ama-Bifocal, anomugqa wawo ohlukile we-bifocal, angase angakhangi kangako ngokombono wobuhle.
Ukunethezeka nokuzijwayeza:Kufanele kucatshangelwe isikhathi sokulungisa esidingekayo kukho kokubili ama-varifocals nama-bifocals.Ngenkathi ama-varifocal enikeza uguquko olungokwemvelo kakhulu phakathi kwamabanga agxilile, abagqoki bangadinga isikhathi sokujwayela ukwakheka kwelensi okuqhubekayo.Abagqoki be-Bifocal bangase bathole ukuzijwayeza ngokushesha ngenxa yomehluko ocacile phakathi kwebanga nezigaba zokubona eduze.
Izidingo zemithi kanye nombono:Abantu abanemiyalelo eyinkimbinkimbi yokubona noma izinselele ezithile ezibonakalayo bangathola ukuthi uhlobo olulodwa lwamalensi luzifanela kangcono izidingo zabo.Kubalulekile ukubonisana nochwepheshe wokunakekelwa kwamehlo ukuze uthole inketho yelensi efaneleke kakhulu ngokusekelwe ezidingweni zombono ngamunye.
Sengiphetha, ama-varifocals nama-bifocals ayahluka ekwakhiweni, izinzuzo zokubona, izithiyo, kanye nokucatshangelwa kwabagqokile.Nakuba ama-bifocals ehlinzeka ngokuhlukanisa okucacile phakathi kwebanga kanye nombono oseduze ngomugqa obonakalayo, ama-varifocal anikeza uguquko olungenamthungo phakathi kwamabanga agxilile amaningi ngaphandle kokuhlukaniswa kwengxenye ebonakalayo.Lapho ukhetha phakathi kwama-varifocals nama-bifocals, indlela yokuphila, izintandokazi zobuhle, ukunethezeka, ukuzivumelanisa nezimo, kanye nezidingo zombono ngamunye kufanele kucatshangelwe.Ngokuqonda izici ezihlukile nokucatshangelwa okuhlotshaniswa nohlobo ngalunye lwamalensi, abantu ngabanye bangenza isinqumo esinolwazi sokubhekana nezidingo zabo zombono ezithile.
Isikhathi sokuthumela: Feb-04-2024