The only soft Silicone Hydrogel contact lens manufactured by digital filming in Morocco. Available as spherical, toric and multifocal, and without parameter limits.
It has the highest DK of lenses manufactured by filming. With its strong hydrophilicity too, it offers the wearer comfort, vision and a better oxygen supply while wearing.
Choice of the definitive lens
BioXtra lenses are custom-made, so provide us with the following data:
For Multifocals we will also need:
Rules for fitting
You can choose the parameters of the lenses (without guarantee of fit), by applying the following rules :
13.50: R0=Km+0.1 14.00: R0=Km+0.2
14.50: R0=Km+0.3 15.00: R0=Km+0.4
Evaluation of fit
After insertion, wait 5 to 10 minutes before evaluating the fit.
A well-fitting lens:
Increase the diameter by at least 0.50 or tighten R0 by at least 0.2 mm
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.
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.
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