The Flexlens Tri-Curve Keratoconus Lens is indicated for daily wear use for the correction of refractive ametropias and specialized use such as atypical ametropias. Examples include, but are not limited to: irregular astigmatism created by keratoconus, trauma, and post penetrating keratoplasty. The lens is for patients with moderate to advanced keratoconus and is ideal for those:

• Who cannot adapt to a rigid lens material
• With monocular keratoconus who wish to wear a soft lens in the fellow eye
• Who experience decentered optics with a rigid lens material

Other patients who may benefit from the increased central thickness and rigidity of the Tri-Curve Keratoconus Lens include those who require a lens for:

• Pellucid marginal degeneration
• Refractive surgery complications

The Flexlens Tri-Curve Keratoconus Lens is based on a tri-curve posterior design. The optical success of the design is based on a standard center thickness that ranges from 0.40mm to 0.45mm, which is often thicker than the keratoconic cornea itself. The design incorporates a flat secondary curve that is 1.2mm to 1.8mm flatter than the base curve. A scleral curve with a radius that is 2.2mm to 2.8mm flatter is added peripherally to align with the scleral curve of the eye. For those patients who exhibit high degrees of irregular astigmatism, they may be better served with the Flexlens Piggyback design.