Alternative product sizes
Product features
Product type hard lens |
BC value 7.10 to 8.50 |
DIA 9.2 to 11.5 |
Material different |
Power range +25.00 to -25.00 |
DK value depending on material |
UV protection depending on material |
Gas flow depending on material |
Lens type Spherical lenses |
BIAS
Hard, gas permeable, individual contact lens with UV filter.
The BIAS has a biaspherical back surface design. As with the ASCON®, the central area of the back surface is spherical up to an angle of 14°. After that, the first aspherical zone with low eccentricity begins. This fitting zone provides uniform support and results in pressure distribution over a large area. The peripheral asphere with high eccentricity represents the comfort zone. It causes a smooth glide during lens movement and supports a centric fit.
In addition to the standard back surface offered here, there are some special forms of BIAS with toric back surface:
You can find these lens types in the section "Hard contact lenses (toric)"
Please order this lens type only if you are already wearing it successfully.
It will be made individually for you. Exchange, cancellation or return, even if the contact lens is in perfect condition, are excluded.
The BIAS has a biaspherical back surface design. As with the ASCON®, the central area of the back surface is spherical up to an angle of 14°. After that, the first aspherical zone with low eccentricity begins. This fitting zone provides uniform support and results in pressure distribution over a large area. The peripheral asphere with high eccentricity represents the comfort zone. It causes a smooth glide during lens movement and supports a centric fit.
In addition to the standard back surface offered here, there are some special forms of BIAS with toric back surface:
You can find these lens types in the section "Hard contact lenses (toric)"
Please order this lens type only if you are already wearing it successfully.
It will be made individually for you. Exchange, cancellation or return, even if the contact lens is in perfect condition, are excluded.
Delivery range of BIAS:
BC values:
7.00 to 9.00
Power:
+25.00 to -25.00
Diameter:
8.0 to 12.2
Materials:
various ( see selection field + images)
Engraving:
To better distinguish right and left lens, a lens can optionally be engraved with a light or dark dot.
7.00 to 9.00
Power:
+25.00 to -25.00
Diameter:
8.0 to 12.2
Materials:
various ( see selection field + images)
Engraving:
To better distinguish right and left lens, a lens can optionally be engraved with a light or dark dot.