GP inverse geometry lens with toric periphery profile
In contact lens fitting, it’s known that when normal geometries do not succeed the desired stabilization or centration, inverse geometry is used (secondary curve, steeper that the base curve). The POST PK lens comes to cover all those cases, integrating back and/or front toric correction, as indicated by the previous example.
Post keratoplasty, corneal shapes with increased height differences at various quadrants
Base curves: 7.00 to 8.60 in 0.10mm steps
Diopters: +40.00 to -35.00 in 0.25 D steps
Diameters: 10.20 mm (Larger diameters also available)
Materials: Optimum Extreme Dk 125, Optimum Extra Dk 100, Boston XO Dk 100, Paragon FSA 52
It’s the first lens choice for cases succeeding penetrating keratoplasty, when a graft is positioned higher than the patient’s corneal shape.
In certain cases, diameters up to 12.50 mm are used to obtain better centration and optical correction.