Patent ID: 7413303

Claim:
An ophthalmic lens having a complex surface with a geometrical centre, a fitting cross situated 4 mm above the geometrical centre and a substantially umbilical progression meridian having a power addition greater than or equal to 1.5 diopters between a far vision reference point and a near vision reference point, the complex surface having: a cylinder value normalized to the addition of less than 0.8 in a circle of radius 20 mm centred on the geometrical centre of the lens; a rebound in the sphere quantity normalized to the addition on the circle of radius 20 mm centred on the geometrical centre of the lens of less than 0.04; a progression length less than or equal to 14 mm, the progression length being defined as the vertical distance between the fitting cross and the point on the meridian at which the mean sphere reaches 85% of the progression of the addition.