Patent ID: 7300153

Claim:
A double progressive spectacle lens, wherein at least one of the two progressive surfaces has at least one of the following properties, in relation to a principal line of sight, distance zone and near zone: a) a profile of surface power along the principal line of sight in a progression channel is not monotonic between y=−15 mm and y=+10 mm, b) a profile of a surface astigmatism along the principal line of sight has at least two clearly expressed maxima that are at least 0.175 dpt above an adjacent minimum, c) a surface astigmatism A deviates in absolute terms by more than dA upward or downward from a prescription value A R of the cylinder at approximately all points along the principal line of sight, d) the surface astigmatism has a global maximum on or in the vicinity of the principal line of sight between y=±20 mm, e) the surface astigmatism has a local maximum on or in the vicinity of the principal line of sight between y=±20 mm, f) 85% of the change in the surface power along the principal line of sight is reached on each of the surfaces on a path of less than 11 mm, g) a channel width at 0.75 dpt has at least two minima in the progression channel between y=+10 mm and y=−18 mm, h) the surface astigmatism A deviates in the distance zone by more than dA upward or downward from the prescription value A R of the cylinder at approximately all points: |A−A R |≧dA, with dA≧0.18 dpt i) the surface astigmatism A deviates in the distance zone by more than dA upward or downward from the prescription value A R of the cylinder at least one point: |A−A R |≧dA, with dA≧0.5 dpt j) the surface astigmatism A deviates in the near zone by more than dA upward or downward from the prescription value A R of the cylinder at approximately all points: |A−A R |≧dA, with dA≧0.22 dpt k) the surface astigmatism A deviates in the near zone by more than dA upward or downward from the prescription value A R of the cylinder at at least one point: |A−A R |≧dA, with dA≧0.4 dpt.