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 diagnostic lens
Please note:
Diagnostic lenses are used to check for proper fit and correct lens power.
It is not possible to choose among different lens materials.
Diagnostic lenses have a slightly stronger tint (greenish or violet) than normal lenses.
Diagnostic lenses are designed for a maximum wearing time of 4 weeks.
Diagnostic lenses are custom-made. No returns are possible !
Diagnostic lenses are used to check for proper fit and correct lens power.
It is not possible to choose among different lens materials.
Diagnostic lenses have a slightly stronger tint (greenish or violet) than normal lenses.
Diagnostic lenses are designed for a maximum wearing time of 4 weeks.
Diagnostic lenses are custom-made. No returns are possible !
Hard gas permeable custom made contact lens with UV filter.
The BIAS has a biaspheric back surface design. Like 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 lens movement and supports a centric fit.
In addition to the standard back surface offered here, BIAS also offers several special forms with toric back surfaces:
These lens types can be found in the category "Hard contact lenses (toric)".
Diagnostic lenses are excluded from return and exchange !
The BIAS has a biaspheric back surface design. Like 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 lens movement and supports a centric fit.
In addition to the standard back surface offered here, BIAS also offers several special forms with toric back surfaces:
These lens types can be found in the category "Hard contact lenses (toric)".
Diagnostic lenses are excluded from return and exchange !
Delivery range of BIAS:
BC values:
7.00 to 9.00
Power:
+25.00 to -25.00
Diameter:
8.0 to 12.2
BC values:
7.00 to 9.00
Power:
+25.00 to -25.00
Diameter:
8.0 to 12.2
Material:
Simple standard material for maximum 4 week wear for test purposes.
Slightly stronger greenish or violet tint.
Simple standard material for maximum 4 week wear for test purposes.
Slightly stronger greenish or violet tint.