Umehluko Phakathi Kwamalensi E-PC Namalensi E-Resin
Esihlokweni esandulele, sifunde ukuthi ayini amalensi e-PC. Lesi sihloko sizonikeza incazelo eningiliziwe yomehluko phakathi kwamalensi e-PC namalensi e-resin.
Amalensi e-PC (i-polycarbonate) kanye namalensi e-resin (ngokuvamile abhekisela ku-CR-39 noma i-resin ene-index ephezulu) njengamanje ayizinhlobo ezimbili ezivame kakhulu zezinto zelensi emakethe yezibuko zamehlo. Nakuba zombili ziwela ngaphansi kwesigaba esibanzi "sepulasitiki," zihluke kakhulu ngokwezakhiwo zomzimba, ukuphepha, kanye nokufaneleka kwamaqembu abasebenzisi ahlukene.
Nasi ukuqhathanisa izici zabo ezibalulekile:
1. Ukumelana Nomthelela Nokuphepha (Umehluko Oyinhloko)
Amalensi e-PC: Ngokuvamile kwaziwa ngokuthi "ingilazi engangenwa yizinhlamvu." Ziqinile kakhulu futhi aziphuki kalula uma zihlaselwa ngobudlova; kunalokho, zingase ziqhekeke noma ziguge. Ngakho-ke, zinikeza izinga eliphezulu lokuphepha.
Amalensi e-Resin: Nakuba zimelana nokushayisana kakhulu namalensi engilazi avamile, zingase ziphuke uma zishayisana kakhulu, okwenza zingaphephile kangako kunamalensi e-PC.
2. Ukusebenza Okubonakalayo (Ukucaca)
Amalensi e-resin: I-coefficient yokusabalala (inombolo ye-Abbe) ivame ukuba phezulu (58 ye-CR-39). Uma inombolo ye-Abbe iphakeme, ukusabalala kwelensi kwehla, okuholela ekuboneni okubukhali kwe-peripheral kanye nenduduzo enkulu yokubona.
Amalensi e-PC: Inombolo ye-Abbe iphansi (ngokuvamile cishe ingama-30). Lokhu kusho ukuthi babonisa ukuphambuka okuphezulu kwe-chromatic; abanye abantu abanokuzwela okuphezulu bangase babone ama-halos anombala we-rainbow emaphethelweni amalensi noma babhekane nokukhathala okuncane kokubona.
3. Isisindo Nobukhulu
Amalensi e-PC: Njengoba inkomba yokubuka ivame ukuba ngu-1.59 kanye nobuningi bezinto ezibonakalayo obuphansi, la malensi alula kakhulu futhi mancane kunamalensi e-resin angu-1.50 ajwayelekile.
Amalensi e-Resin: Izinketho zenkomba yokubuyisa ziyahlukahluka kakhulu (1.50, 1.56, 1.60, 1.67, 1.74). Ngesikhathi esifanayo senkomba yokubuyisa ephansi, amalensi e-resin asinda kancane kunamalensi e-PC; noma kunjalo, ngemithi ephezulu, amalensi e-resin anenkomba ephezulu kakhulu (njenge-1.74) angenziwa abe mancane kunamalensi e-PC.
4. Ukumelana Nokuklwebha
Amalensi e-Resin: Lezi zinobulukhuni obuhle kakhulu futhi zinikeza ukumelana okuhle kakhulu kokuklwebheka uma zimbozwe ngesembozo sokuqina.
Amalensi e-PC: Le nto ithambile futhi ivame kakhulu ukuklwebheka. Nakuba iza nopende olumelana nokuklwebheka oluvela efektri, zidinga ukunakekelwa okucophelelayo kwansuku zonke kunamalensi e-resin.
5. Ukuvikelwa kwe-UV
Amalensi e-PC: Izinto ngokwazo zihlinzeka ngokuvikelwa okungu-100% kwe-UV (UV400), ngakho-ke akudingeki ukugqoka okwengeziwe kwe-UV-blocking.
Amalensi e-Resin: Ama-resin ajwayelekile (njenge-CR-39) awanikezi ukuvikelwa okuphelele kwe-UV ngokwemvelo; ukuvikelwa kwe-UV kumele kutholakale ngokumbozwa kwangemva kokukhiqizwa noma ukuguqulwa kwezinto eziyisisekelo.
Ukuqhathaniswa Kwezincazelo Eziyinhloko
| Izici | Amalensi e-PC | Amalensi e-Resin |
| Ukumelana Nomthelela | Kuphezulu Kakhulu (Izinga Elingangeni Amachashazi, Kunconywa) | Isilinganiso (Sithambekele Ekuphuleni Uma Sithinteka Kakhulu) |
| Inombolo ye-Abbe | Okuphansi (cishe 29–32; kuthambekele ekushintsheni kwe-chromatic emaphethelweni) | Okuphezulu (cishe ama-degrees angu-58; okuhlanzekile ngokubona) |
| Isisindo | Kukhanya kakhulu | Kukhanya kancane |
| Ukuvikelwa kwe-UV | Ukuvikelwa kwe-UV okungu-100% okungokwemvelo | Kudinga ukumbozwa okwengeziwe/isisekelo esikhethekile |
| Ukumelana Nokugqoka | Ayilungile (ithambile, ivame ukuklwebheka) | Kuhle (kuqinile kakhulu uma kuqina) |
| Izinhlelo Eziyinhloko | Izibuko zezemidlalo, izibuko zezingane, izibuko ezingenamphetho | Izibuko zikadokotela zansuku zonke, amalensi e-progressive multifocal |
Isifinyezo: Kufanele Ukhethe Kanjani?
Khetha amalensi e-PC uma:
1. Uvame ukuhlanganyela kwezemidlalo (njenge-basketball noma i-tennis), noma uma uthola izibuko zezingane noma intsha - ukuphepha kuza kuqala.
2. Uhlela ukugqoka izibuko ezingenama-rim noma ezingenama-semi-rim. Amalensi e-PC ahlala isikhathi eside futhi awanawo amathuba okuqhekeka uma kubholwa imigodi yezikulufo.
3. Uzwela kakhulu isisindo sezibuko zakho futhi ufuna ukukhanya okuphezulu.
Khetha amalensi e-resin uma:
1. Uzisebenzisela umsebenzi wasehhovisi nsuku zonke, ukufunda, noma ukushayela, futhi ulindele lukhulu kakhulu ngokucaca kokubona kanye nenduduzo (ukulungiswa kokuphazamiseka kwe-chromatic).
2. Une-prescription ephezulu (isb., ama-diopter angaphezu kuka-600) futhi udinga amalensi ane-index ephezulu (1.67 noma 1.74) ukuze ugcine amalensi emancane.
3. Unesabelomali esilinganiselwe, noma ufuna amalensi aqinile futhi ahlala isikhathi eside.