1) Having several focuses 
A lens with multiple powers eg a trifocal or progressive lens.
Arising from or pertaining to many locations. ... (16 Dec 1997) ... 
(mul″te-fo´kәl) arising from or pertaining to many sites or locations.
occurring at more than one site.
Type: Term Pronunciation: mŭl′tē-fō′kăl Definitions: 1. Relating to or arising from many foci.
Multifocal: Having to do with two or more foci or arising from two or more places. For example, aortic aneurysm disease is often multifocal and needs total aortic screening for diagnosis.
multifocal 1. Having several foci. 2. With reference to an eyeglass lens having several focusing areas that correct for both nearsightedness and farsightedness.
having several focuses. · (of an eyeglass lens) having several focusing areas that correct for both nearsightedness and farsightedness.