bifocal lens meaning in Hindi

Examples

1. Bifocal lenses advanced little in the first half of the 19th century.
2. For example, the first bifocal lenses came from Rodenstock as did UV-absorbing lenses.
3. Bifocal lenses cost between $ 200 and $ 250.
4. During that time he invented the cemented bifocal lens.
5. Bifocals lenses are about $ 110, Azar said.
6. Bifocal lenses are also available for this application.
7. The idea of the progressive lens came to him as he tried on his father s bifocal lenses.
8. A progressive lens tries to minimize the visible boundary between different regions, unlike a bifocal lens for example.
9. Stage-by-stage, he experiences the vision produced by single-vision and bifocal lenses, and then that of standard progressive lenses, and ultimately Varilux lenses.
10. He also used a close-up focusing filter on the bottom half of the camera lens, which, like a bifocal lens, is divided into two.