Soft Contact Lenses,  Semi-Annual ,  Custom-Made

  • Increased comfort
  • Exceptional visual acuity
  • Better oxygenation of the cornea
  • Great stability
  • No parameter limits
  • Myopia
  • Hyperopia
  • Astigmatism
  • Presbyopia

  • 6 Months
  • Daily wear


The only soft Silicone-Hydrogel contact lens with semi-annual replacement. Available in spherical, toric and multifocal and without parameter limits.

These contact lenses are made of the latest generation material, offering the wearer comfort, better vision and oxygenation throughout the wearing period.


Choice of the definitive lens

BioMax lenses are custom-made, so provide us with the following data:

Corneal diameter (HVID)
Glasses Correction

For Multifocals we will also need :

The dominant eye
Pupillary diameter
The addition in VP

Fitting rules

You can choose the parameters of the lenses (without guarantee of fit), by applying the following rules :

LC diameter = Corneal diameter (HIVD) + 2 mm
Radius: Depending on the total diameter:
13.50: R0=Km+0.2         14.00: R0=Km+0.4
14.50: R0=Km+0.6         15.00: R0=Km+0.8
Convert glasses strength into contact lenses by taking into account the glass-eye distance

Evaluation of fit

After insertion, wait for 5 to 10 minutes before evaluating the fit.

A good-fitting lens:

Shows 0.5 to 1 mm blinking movement
On “push up” the lens refocuses quickly
Its edge is 1 to 1.5 mm from the limbus
Is comfortable

Poor Fit

Blurred vision after blinking
Excess Mobility
Axis rotation with toric lenses
Induced astigmatism with additional refraction

Recommended Actions:
Increase the diameter by at least 0.50 or tighten R0 by at least 0.2 mm

Tight Fit

Clear vision after blinking
Reduced mobility
Axis rotation for toric lenses

Recommended Actions:
Decrease the diameter by at least 0.50 or flatten R0 by at least 0.2 mm

Cyl axis rotation

In toric lens, check the marking of the axis which must be at 6 o’clock, and in case of rotation note the position.

Recommended actions:
If you communicate the rotation to us, lenses under warranty will be redone taking into account this parameter

Fit for multifocals

Multifocal lenses require an adjustment time of at least 4 days of regular wear.
The patient must be motivated and aware that there is a trade-off between wearing contact lenses and good depth of field.

Fit protocol

VL : Correction with maximum convex
VP : Minimum addition in binocular

Determination of the dominant eye:

  • The subject wears his best correction in VL, and binocularly fixes the optotype from a distance,
  •  Alternately place a +0.75 lens in front of each eye and ask the wearer when they are most uncomfortable.
  • The most uncomfortable eye is the dominant eye.

On delivery check the centering and mobility of the contact lens


Radius of curvature  7.00 to 12.00 mm by 0.1
Diameter 12.00 to 18.00 mm by 0.1
Sphere +30.00 to -30.00 D by 0.25
Cyl Up to 10.00 D by 0.25
Axis 0° to 180° by 1°
Addition Up to 4.00 D by 0.25


Material UNISIL
Hydrophilicity 62%
DK 50
Modulus 0.80 MPa
UV Filter Yes
Handling color  Blue



We recommend the preservative-free soft contact lens care solution Regard®

See product




Biolens Lab offers a 1-month guarantee of fit for BioSoft lenses, on the condition of communicating the keratometry, or any other parameter necessary for determining the final lens.

If the parameters are defined by the prescriber, no returns can be accepted.