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Product features
| Product type hard lens |
BC value 7.10 to 8.50 |
DIA 9.2 to 11.5 |
Material various |
| 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-F
Hard gas permeable custom contact lens with UV filter.
The BIAS-F has a biaspherical back surface design. As with the ASCON®, the central back surface area is spherical up to an angle of 14°. After that, the first aspherical zone with low eccentricity begins. This fitting zone allows a uniform support and leads to a large-area pressure distribution. The peripheral asphere with high eccentricity represents the comfort zone. It causes a smooth glide during the lens movement and supports a centric fit.
In addition to the standard back surface offered here, there are several special forms of BIAS with toric back surfaces:
You can find these lens types in the section "Hard contact lenses (toric)"
Please order this type of lens only if you already wear 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-F has a biaspherical back surface design. As with the ASCON®, the central back surface area is spherical up to an angle of 14°. After that, the first aspherical zone with low eccentricity begins. This fitting zone allows a uniform support and leads to a large-area pressure distribution. The peripheral asphere with high eccentricity represents the comfort zone. It causes a smooth glide during the lens movement and supports a centric fit.
In addition to the standard back surface offered here, there are several special forms of BIAS with toric back surfaces:
You can find these lens types in the section "Hard contact lenses (toric)"
Please order this type of lens only if you already wear 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-F:
BC Values:
7.00 to 9.00
Power:
+25.00 to -25.00
Diameter:
8.0 to 12.2
Materials:
various ( see selection box + illustrations)
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 box + illustrations)
Engraving:
To better distinguish right and left lens, a lens can optionally be engraved with a light or dark dot.
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