We already have contact lenses that contain more than one prescription, enabling the wearer to adjust her focus depending on the distance from the object she is viewing—similar to bifocal or ...

18 DISC lens was a custom-made bifocal soft contact lens of concentric rings design. It comprised of a correction zone in the centre and a series of alternating defocusing and correction zones ...

The bifocal lenses are made from bilayer structures of liquid crystal (LC) cells and LC polymer. These lenses split light with a left-handed circular polarization (LCP) into two focused light ...

I couldn’t wait to try some cycling glasses that met both needs. I wasn’t disappointed. I tested two pairs from BZ Optics: the PHO Bifocal Photochromic HD Lens model and the smaller ‘women/junior’ ...

We further develop a bifocal lens antenna to not only converge the electromagnetic wave, but also compensate the SNR loss on traditional electromagnetic waves. Simulation results show that the ...

METHODS Calculations were done to show the diameter of halos in the case of the bifocal intraocular lens. 24 patients with a refractive multifocal IOLs and five patients with a monofocal IOL were ...