Special Lenses Bi-Asfera

Special Glasses

Clear, natural and
aesthetic vision

Ideal single vision lens for people who need high performance of vision and correction. It not only eliminates the deformations that may occur in the peripheral areas, but also prevents the eye from appearing larger or smaller depending on the prescription dioptries. All these benefits are offered by the aspherical design on both the front and back surfaces of the lens.

Astigmatism, which occurs as a result of corneal curvature, causes these people to see objects as deformed. Sometimes a point can appear in the form of a line, sometimes in the form of a flat earth from the poles of a completely round shape. In this case, an exact replica of the object viewed on the retina never occurs. The use of a spherical design lens also does not eliminate this deformation.

Benefits of Bi-Asfera

In the production of Bi-Asfera single vision glasses, the aspherical semi-finished product and the aspherical surface design processed on the back surface are used to expand the visual field and increase the quality of vision. In Bi-Asfera , developed by NOVAX , the aspherical structure of both the front and back surfaces is optimized, thus preventing deformations, especially in the lateral areas, and providing you with a more aesthetic eyeglass lens.

Why should we use Bi-Asfera?​

Bi-Asfera Spectacle Lenses
Bi-Asfera Spectacle Lenses

In a spherical designed eyeglass lens, as you move towards the peripheral area, the eye begins to perceive numbers outside the prescription values, causing serious image deformations in that area.

Why should we use Bi-Asfera?​

Bi-Asfera Spectacle Lenses
Bi-Asfera Spectacle Lenses

With Bi-Asfera, the size of the eyes appears closest to their natural size, even at high prescription values.

Esthetically Thin & High Optical Performance

Double Aspheric
Bi-Asfera Design

The lowest astigmatism
value obtained on both
surfaces of the lens

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Flatter front surface and up to 15% reduced thickness.

By providing clear vision across the entire surface of the lens, astigmatic distortion is reduced on both surfaces

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Front Surface
Aspheric Design

Intermediate level of astigmatism power on peripheral area

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Reduction in thickness and weight, especially at low and medium prescriptions.

Reduction in deformations in the peripheral area of the lens, thanks to the minimization of astigmatic effects

Spheric
High level of astigmatism in the peripheral area

The highest thickness and weight in all prescriptions.

 

High astigmatism value and reduced image quality