Progressive addition lenses without narrow progressive corridor

A progressive addition lens without narrow progressive corridor, comprising:

• a distant vision zone at an upper part of a lens;
• a near vision zone at a lower part of the lens;
• and
• a intermediate vision zone at a middle part of the lens and between the distant vision zone and the near vision zone, wherein a peripheral astigmatism zone is on both sides of the intermediate vision zone,
• wherein the lens is directly formed by a freeform machining process, a rear surface of the lens is a freeform surface, the intermediate vision zone increases a field of view by the freeform surface, forms an area that does not have a progressive corridor area and reduces the peripheral astigmatism zone, and a ratio of the peripheral astigmatism zone to the intermediate vision zone is between 5% and 20%,
• wherein the front surface of the lens is a spherical surface, or an aspherical surface determined according to the following formula:
• x2+y2+(1+Q)z2−2zR=0
• where x is the x axis of a coordinate system on a surface of the lens, y is the y axis of the coordinate system of the surface of the lens, z is a surface height, R is a radius of curvature of an apex of the lens, and Q is the spherical surface or the aspherical surface (Q=0 represents the spherical surface, and Q≠0 represent the aspherical surface).