Sector or “quadrants specific” modules are needed to minimize application risks related to irregular corneal asymmetry, which results in instability and reduced RGP centering gap.
Thanks to the Free-Form lathe technologies, based on the oscillating movement of the tool and integrated with CAD-CAM design software, it is possible to associate a specific curvature to each hemi-meridian (0°,90°, 180° and 270°) a specific curvature, creating lenses of the Specialty range with an exclusive design.
In relation to the problem, the sectoral module is associated with all RGP lac of large diameter, corneo-scleral and scleral, of the SCL family.
These designs are based on specific firtting protocols and provide professional service support in assessing effectiveness and feasibility.
The asymmetry is determined according to the eye morphology and is necessary to solve – “fill” – the altimetric differences present between the corneal profile and the local sagittal of the lens.
To achieve a custom fit, all geometries are susceptible to bending and diameter data for different areas; they can be realized with spherical or back toric optics to which it is possible to associate a frontal cylindrical correction. All lenses are stabilized with high definition optical ballast prism.