iKone | Keratoconus


  • Keratoconus
  • Manufactured in Contamac Optimum materials.
  • Larger optic zone results in better distribution of bearing zone, thus better centration.


  • Patients who have diagnosed with keratoconus.

Lens Parameters

  • Any base Curve radius
  • Diameters - 8.8, 9.6, 10.4
  • Edge Lift - Standard, steps steeper and flatter than standard
iKone Fitting Guide
Lens Type | Keratoconus
Diagnostic Lens Color | Blue
  1. Determine the base curve by referring to the 'steepest K' reading or steepest 'sim K' value.
  2. If reliable K readings or corneal topography data is not available, select the 50.00D (6.75mm) base curve lens from the diagnostic set.
  3. A lens should exhibit a slight clearance over the central corneal ectasia.
  4. Analyze the peripheral curve for an alignment pattern with an adequate edge lift, if adjustments are needed, use the step system to modify the edge lift of the lens.
  5. Call your Valley Contax lens consultant to customize the fit for your patient.