Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading section. A common style is the 7×28 flat-top or D-shaped segment, 28 mm ...

Hold up the millimetre ruler vertically across the frame so that the starting "0" measurement is at the bottom of the pupil and the rest of the ruler crosses the bottom frame of the glasses. The ...

Bausch + Lomb received approval in October from the U.S. Food and Drug Administration for the enVista Envy Trifocal, the company’s first hydrophobic acrylic trifocal intraocular lens with an ...

A new option for bifocal and trifocal wearers is now available ... the Spectacle Request Transmission System. These glasses are at no cost to eligible DoD retirees. Fitting kits for the optometry ...