In many progressive lenses,the additional power starts from the fitting point.
For this reason, the wearer may feel a sense of swaying, distortion or blurring when shifting his/her line of vision slightly from the front to the side.
In the Corridor Shifting Function design, the fitting point and the start point of the additional power are separated to ensure a power stabilization area, ensuring sharp frontal vision.
In addition, to achieve ease of vision and accomodation, changes in the power stabilization area and progressive power corridor length are optimized for each added power.
(This design is used in Pursuit EV.)
The distance between the fitting point (FP) and the additional power start point is decreased with increasing additional power.
The progressive power corridor is lengthened according to increasing added power.
This results in a sharp field of long-distance vision and supported near-distance field of view.
|SEIKO||Individual Lens||PursuitEV 1.67／1.60／1.56||
To details of products