bifocal lens वाक्य

उदाहरण वाक्य

1. Narrow frames can contain a reading lens, a bifocal lens or, like their fatter 1980s counterparts, a progressive lens that offers a progression of six to 10 focal lengths from an upper distance to middle computer and lower reading lens, said David Caluori, purchasing manager and optician at Di Napoli Opticians.