Multifocal lens

Details Multifocal lens Multifocal lens

G - Physics

02

C

88/99

G02C 7/06 (2006.01) G02C 7/02 (2006.01)

Patent

CA 1270397

Abstract of the Disclosure A multifocal lens has an upper distance vision zone which is divided by a visible division from a distinct lower portion of the lens which includes an intermediate vision zone of progressively increasing dioptric power which leads into a near vision zone. The visible division is provided by an abrupt change in dioptric power in the range from about 0.5 dioptres to about 0.5 dioptres less than the difference between the constant dioptric powers of the near vision zone and the distance vision zone.

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