AirFlex

Next generation silicone hybrid lenses

  • great comfort thanks to the Silicone Hydrogel soft skirt

  • a high level of oxygen permeability (Dk 100)

  • the control of spherical aberration thanks to a high-definition aspheric design

  • the visual acuity of a rigid lens

  • simple fitting protocol even on difficult corneas

  • a flexible wear schedule enabling both daily and occasional wear

Description

Geometry

  • Symmetric 
  • Back toric
  • Front Toric
  • Bitoric
  • Multifocal

Material

ESiH + UV filter

  • Soft skirt: Silicone Hydrogel Filcon V3 (colorless), Silikon Hydrogel 50%, DK = 50 x 10-11 (ISO FATT)
  • RGP central zone: Optimum Extra Roflufocon D (blue), DK  = 100 x 10-11 (ISO FATT)

Indications of AirFlex hybrid lenses are:

  • Wearers of RGP lenses having problems relating to comfort, centration or stability
  • Keratoconus and other corneal irregularities, including highly complex irregular corneas
  • All astigmatisms that can potentially be fitted with RGPs
  • All high ametropias
  • Wearers of Piggyback lenses
  • Unilateral or occasional wear

Lens care:

  • Peroxide solution or multipurpose solution for soft contact lenses
  • Cleaning solution for soft lenses after removal

Technical Data

Parameterfromto/orsteps
Total diameter14.90 mm15.50
BC5.50 mm10.00 mm0.05 mm
Diameter RGP8.50 mm10.00 mm
Soft skirt J-IndexJ -2.0J +2.00.5
Eccentricity0.001.500.05
Sphere-40.00 dpt+40.00 dpt0.25 dpt
Cylinder-0.50 dpt-6.00 dpt0.25 dpt
Axis180°
Addition+0.75 dpt+4.00 dpt0.25dpt

Additional information

Lens Type

Indication

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Correction type

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Application

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Designed by

SwissLens

Fitting advices for AirFlex

AirFlex hybrid lenses are next generation hybrid contact lenses that consist of :

  • a central zone made of a high Dk RGP material, for excellent vision
  • a soft peripheral skirt made of a Silicone Hydrogel material, for easy fitting and comfort

The skirt is modifiable. It is important to note that the fitting of the skirt is totally independent of the central zone and does not have any influence on the vision. The skirt should be perfectly aligned with the conjunctiva.

Fitting protocol

The fitting protocol depends on whether you fit regular or irregular corneas.

Please note:

  • the standard lens diameter (ØT) is always 14,90 mm for both, regular and irregular corneas
  • the standard skirt (J-index) is always J 0.0 for both, regular and irregular corneas
  • the standard diameter of the RGP part (ØRGP) with irregular corneas (eg. keratoconus) is 8,50 mm.
  • the standard diameter of the RGP part (ØRGP) with regular corneas is 10,00 mm.
  • for corneal astigmatism > 4.00 dpt or internal astigmatism > 0.75 dpt a toric design will be recommended

1. Determine Base curve (R0) and lens power

For regular corneas

  • BC (r0) = Kflat (radius of flattest K reading)
  • if back Toric: r0steep = Ksteep +0.20 mm
  • ØT = 14,90 mm (standard)
  • J = 0.0 (standard skirt)
  • Lens power = eyeglasses sphere (Vertex power = 0)
Patient parameters:

7.80 (100°) / 7.35 mm
-3.00 / -3.00 105°

First trial lens:
J 0.0 / 14.90 / 7.80 / -3.00

early stage keratocone
For irregular corneas

For the most irregular corneas, we recommend to use a “trial RGP” with ØT ≤ 9,50 mm in order to Determine the Base curve:

  • Early stages: BC (r0) = Kflat
  • Advanced stages: BC (r0) = Base Curve of “trial RGP ”
  • BC (r0) = Kflat (radius of flattest K reading)
  • J = 0.0 (standard skirt)
  • Lens power: = eyeglasses sphere (Vertex power = 0) − (Kflat − r0) * 5
Patient parameters:

6.30 (25°) / 5.50 mm
-7.00 / -5.25 30°
Optimal “trial RGP”: 8.7 / 6.2 / -8.25

First trial lens:
J 0.0 / 14.90 / 6.20 / -8.25

advanced stage keratocone

2. Assess the fit

Control visual acuity:

If visual acuity is insufficient, perform a spherical over-refraction and compensate for Vertex distance to determine final lens power.

Evaluate the fit during a slit lamp exam:

As in soft contact lens fitting, the evaluation is based on

  1. Centration
  2. Mobility
  3. Fluorescein at lens removal
Verify the alignment of the lens using large molecule fluorescein.

Never use fluorescein for RGP lenses as this may damage the hybrid lenses.

Example of a good fit:

Centration is good:
The lens covers the entire corneal surface

Mobility is good:
The lens moves easily about 0,25 mm with each blink

Too steep fit

Increase BC by 0,10 mm
Add + 0,50 dpt to lens power

Good fit

The Base Curve is optimal. There is little or no fluorescein in the central zone and an arc of 1 to 2 mm of fluorescein at the junction.

Too flat fit

Decrease BC by 0,10 mm
Add -0,50 dpt to lens power

What if either centration or mobility is non-satisfactory?

Steepen or flatten the skirt. 4 skirts are available:

Product Video

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