Standard and modified occupational multifocal lenses

Most people with presbyopia get satisfying vision correction from conventional bifocal or trifocal lenses. But for those spending all day long in a job or hobby that requires only near vision or distance vision, special occupational bifocals or trifocals are needed. These special occupational multifocal lenses have unusual placement of near, intermediate and far vision zones in the lenses, meeting different, specific needs.