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Bi-AS

Thinnest in the world

Combination of the highest index material and the latest lens design allow the thinnest lens in the world.

TOKAI provides a high-quality field of vision fit you perfectly.

How thicknesses are different?

It’s not only about thinness but also "to look" and "to see" better.


Double surface aspherical design

Bi-AS

Improving optical performance and flatting lens.

A custom made surface an individual customer

Optimized power on each prescription
The highest spec of power is realized

Optimized aspheric amount on frame shapes
The most suitable optical performance is achieved by individually designed aspheric amount on frame shape data, especially in case of plus and mixed power lenses.

Optimized atoric on each prescription
A clear and wide vision field is achieved by correcting aberration omni-directionally.

2 designs

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