Alden GP Sphere and GP Toric Lenses

Rigid gas permeable corneal lenses for myopia, hyperopia, and astigmatism.

Alden GP Sphere Parameters
Material Boston XO®, Boston XO2®, Boston EO®, Boston ES®
Diameters 7.0 mm to 21.0 mm
Base curves 4.0 mm to 9.0 mm
Spherical powers -20.00D to +20.00D

Alden lenses are measured from back surface

Alden GP Toric Parameters
Material Boston XO®, Boston XO2®, Boston EO®, Boston ES®
Diameters 7.0 mm to 21.0 mm
Base curve 4.0 mm to 9.0 mm
Spherical powers -20.00D to +20.00D

Alden lenses are measured from back surface

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