I-BIFOCAL FUTHI IYAQHUBEKA

I-Bifocal

Ilensi enezinkambu ezimbili zokubona ezihlukaniswa ngomugqa.Ngokujwayelekile ingaphezulu likhethelwe ukubona ibanga noma ibanga lekhompuyutha futhi eliphansi likhethelwe umsebenzi wokubona eduze njengokufunda.

Kulensi ye-Bifocal, izinkambu ezimbili zokubona zihlukaniswa ngokuqondile ngokuthi aebonakalayoumugqa.Indawo ephansi yokufunda ingu-28mm ububanzi futhi ibekwe ngaphansi nje komugqa omaphakathi welensi.Ukuma kwendawo ye-bi-focal kuzothintwa ukuphakama ngokomzimba kwelensi ekhethiwe.

Ingqikithi yobude belensi yelensi ye-Bifocal kufanele ibe ngu-30mm noma ngaphezulu.Sincoma ilensi ende ukuze ugqoke ntofontofo, kodwa u-30 mm ubude obuncane belensi ye-bifocal.Uma uhlaka olukhethiwe lunobude belensi obungaphansi kuka-30mm, kufanele kukhethwe ifremu ehlukile yamalensi e-Bifocal.

Okuqhubekayo

Lokhu kubhekisela ekwakhiweni kwelensi okuhlanganisa izinkambu eziningi zokubona, ngaphandle kwemigqa, futhi ngezinye izikhathi kubizwa ngokuthi “i-no-line multi-focal”.Kulensi eqhubekayo, umumo wengxenye elungisiwe yelensi cishe ufana nefaneli noma ikhowe.

Ku-Standard Progressive, ingxenye ephezulu ngeyokubona ibanga, incipha iye endaweni emaphakathi ephansi ukuze ibone okumaphakathi, ekugcineni ifike engxenyeni engezansi yombono wokufunda.Izindawo ezimaphakathi nezifunda kulindeleke ukuthi zibe zincane kunendawo yebanga.I-Standard Progressives amalensi aqhubekayo asetshenziswa kakhulu.

Ku-Workspace Progressive, ingxenye ephezulu ingeyokubona okuphakathi, kuyilapho ingxenye engezansi ingeyokubona eduze noma ukufunda;awukho umbono webanga ku-Workspace Progressive.Kunezinhlobo ezi-2 ze-Workspace Progressives: I-Mid-Range Progressive, kanye ne-Near-Range Progressive.I-Mid-Range Progressive ifanele umsebenzi oseduze ohilela ukubona okusindayo okumaphakathi njengamakhompuyutha edeskithophu nemihlangano, kuyilapho i-Near-Range Progressive ingcono kakhulu endaweni emile eduze nomsebenzi njengokufunda isikhathi eside, ukusetshenziswa kwedivayisi ephathwa ngesandla, nokwenza ubuciko.

Ubude belensi yelensi eqhubekayo kufanele bube ngu-30mm noma ngaphezulu.Sincoma ilensi ende ukuze ugqoke ntofontofo, kodwa ubude obuncane belensi bungama-30 mm.Uma lolu hlaka lunobude balensi obungaphansi kuka-30mm, kufanele kukhethwe ifremu ehlukile yamalensi aqhubekayo.

 


Isikhathi sokuthumela: Dec-10-2020